A hole machining device for rapid positioning of a flange plate

Abstract

The present invention relates to the technical field of punching positioning. The present invention discloses a hole processing device for rapid positioning of a flange plate, which includes a horizontally arranged workbench. A flange support is provided on the left side of the top of the workbench, and the flange plate is rotatably connected to the flange support on the workbench; through the arrangement of the positioning pin and the first spring, after the positioning pin aligns with the first flange hole, the positioning pin moves downward under the elastic force of the first spring to drive the first traction assembly to pull the first convex block to squeeze the second convex block to move towards the third convex block, so that the second convex block and the third convex block are connected, and the positioning bushing and the positioning sleeve are fixed. At this time, the angular orientation of the positioning rod is limited. During the subsequent punching of the flange plate, there is no need to manually rotate the positioning rod around the positioning bushing to find the next punching position. Instead, by directly rotating the flange plate, the punching position can be accurately and quickly found, ensuring the punching accuracy while improving the punching efficiency.

Description

Technical Field

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

[0002] The number of large drilling machines and milling machines is still relatively small. Workpieces that need to be processed by large drilling machines generally need to be sent to factories with corresponding equipment for processing, and then transported back after processing. The whole process is time-consuming and laborious, and long-distance transportation is also likely to cause damage to the workpieces.

[0003] Chinese invention patent CN110421195B discloses a punching positioning device for large flange-type workpieces, including a horizontally arranged workbench. On the right side of the top surface of the workbench, there is a vertically arranged drilling machine. On the left side of the drilling machine, there is a vertical positioning plate support. Inside the positioning plate support, there is a horizontally arranged positioning plate. In the left part of the positioning plate, there is a positioning sleeve. On the left part of the positioning plate support, there is a circular flange plate support. On the upper part of the flange plate support, there is a flange plate. In the center of the top surface of the flange plate, there is a center positioning pin. At opposite positions on the top of the flange plate, there are horizontally arranged positioning rods. Both ends of the positioning rods are provided with vertical through holes. A plurality of processing holes are evenly arranged circumferentially on the flange plate. At opposite positions below the flange plate, there are auxiliary supports. The beneficial effects of the present invention are: not only can accurate holes be punched on large flange-type workpieces, but also the operation is simple.

[0004] In the above-mentioned comparative document, holes are punched on large flange workpieces by calculation and then pre-setting the positioning rods. However, in the actual operation process, there are the following problems. Since both ends of the positioning rods are movably connected and the angles of the positioning rods are not fixed, every time when looking for the next punching position, manual operation of the positioning rods is required to find the accurate punching position, which reduces the punching efficiency.

[0005] Therefore, it is necessary to provide a hole processing device for rapid positioning of a flange plate to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a hole processing device for rapid positioning of a flange plate to solve the problems in the prior art described in the above background art, such as the angles of the positioning rods are not fixed because both ends of the positioning rods are movably connected, so every time when looking for the next punching position, manual operation of the positioning rods is required to find the accurate punching position, which reduces the punching efficiency.

[0007] Based on the above idea, the present invention provides the following technical solution: It includes a horizontally arranged workbench. On the left side of the top of the workbench, there is a flange support. The flange plate is rotatably connected to the flange support on the workbench. On the right side of the top of the workbench, there is a drill press. Below the drill bit of the drill press, there is a positioning plate. Inside the positioning plate, there is a positioning sleeve fixedly installed. On the outside of the positioning sleeve, there is a positioning shaft sleeve. The positioning shaft sleeve and the positioning sleeve are fixed by a second convex block. On one side of the second convex block, there is a third convex block. On the other side of the second convex block, there is a first convex block. At one end of the first convex block close to the second convex block, there is a first traction component; on the outside of the positioning shaft sleeve, there is a positioning rod fixedly connected. At the end of the positioning rod away from the positioning shaft sleeve, there is a sleeve fixedly connected. Inside the sleeve, there is a positioning pin connected by a first spring. The top end of the positioning pin is fixedly connected to the first traction component. When the first hole is drilled on the flange plate, rotate the flange plate, rotate the positioning rod with the positioning shaft sleeve as the axis, so that when the positioning pin aligns with the first flange hole, the positioning pin moves downward under the elastic force of the first spring to drive the first traction component to pull the first convex block to squeeze the second convex block to move towards the third convex block, so that the second convex block and the third convex block are connected, and the positioning shaft sleeve and the positioning sleeve are fixed.

[0008] As a further solution of the present invention: The first traction component includes three first pulleys and a first pull rope. Two of the first pulleys are rotatably connected to the positioning rod, and one is located at the top of one side of the positioning rod, and the other is located at the bottom of the other side of the positioning rod. The third first pulley is rotatably connected to the sleeve; the first pull rope passes through the three first pulleys in sequence, and one end of the first pull rope passes through the sleeve and is fixedly connected to the positioning pin, and the other end passes through the positioning shaft sleeve and is connected to the first convex block.

[0009] As a further solution of the present invention: The side of the first convex block close to the second convex block is set as an arc surface. Both sides of the second convex block are set as arc surfaces. The cross-sectional shape of the middle part of the outside of the positioning sleeve is trapezoidal. There is a card slot opened at the top of the second convex block; the third convex block and the positioning shaft sleeve are connected by a second spring. The side of the third convex block close to the second convex block is set as an arc surface, and the third convex block is adapted to the card slot.

[0010] As a further solution of the present invention: There is a support block close to the bottom of the flange plate. The support block is arranged directly below the drill bit, and there is a through hole opened at the top of the support block. The position of the through hole is on the same vertical line as the drill bit; on the top of the flange plate, there are two groups of fixed blocks symmetrically arranged. The two groups of fixed blocks are driven by a driving component to lift and clamp or release the flange plate.

[0011] open the flange plate.

[0012] As a further solution of the present invention: The driving assembly includes a rotating rod, which passes through the support plate and is rotationally matched with it. Two symmetrically arranged turntables are fixedly connected to the outer side of the rotating rod. A chute is provided on the turntable, and the fixed block is slidably connected to the inside of the chute; and one end of the fixed block passes through the chute and is slidably connected to the support plate.

[0013] As a further solution of the present invention: A limiting assembly is provided on the outer side of the rotating rod. The limiting assembly includes a ratchet wheel, which is fixedly connected to the outer side of the rotating rod. A ratchet pawl is provided on one side of the ratchet wheel. The ratchet pawl is fixed to the support rod through a torsion spring, and the support rod is fixedly connected to the support plate.

[0014] As a further solution of the present invention: The rotating rod and the positioning pin are connected by a second traction assembly. The second traction assembly includes two second pulleys. One of the second pulleys is rotatably connected to the positioning rod, and the other second pulley is rotatably connected to the rotating rod through a one-way damping bearing. A second pull rope is sleeved on the outer side of the second pulley. One end of the second pull rope is fixedly connected to the second pulley on the outer side of the rotating rod, and the other end passes through the sleeve and is fixedly connected to the top end of the positioning pin.

[0015] As a further solution of the present invention: The length of the second pull rope can be adjusted according to the distance from the punching position of the flange plate to the center point of the flange plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows. Through the setting of the positioning pin and the first spring, after the first hole is drilled on the flange plate, the flange plate is rotated, and the positioning rod is rotated around the positioning bushing as the axis to find the punching position of the second flange plate. When the positioning pin is aligned with the first flange hole, the positioning pin moves downward under the elastic force of the first spring to drive the first traction assembly to pull the first convex block to squeeze the second convex block to move in the direction of the third convex block, so that the second convex block and the third convex block are connected, and the positioning bushing and the positioning sleeve are fixed. At this time, the angular orientation of the positioning rod is limited. In the subsequent punching of the flange plate, there is no need to manually rotate the positioning rod around the positioning bushing as the axis to find the subsequent punching positions. The punching positions can be accurately and quickly found directly by rotating the flange plate, which ensures the punching accuracy and improves the punching efficiency while.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows. A support block is provided at the bottom of the flange plate near the punching position of the flange plate to prevent the flange plate from tilting during drilling and improve the punching accuracy. The stability and punching accuracy of the flange plate punching are further improved by clamping the flange plate from the top by two fixed blocks.

[0018] Compared with the prior art, the beneficial effect of the present invention is that through the setting of the second traction component and in combination with the cooperation of the driving component, while releasing the fixation of the flange plate, the positioning pin can be taken out from the previously drilled hole, and then continue to find the next drilling point, saving one operation step and further improving the drilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the drawings and embodiments.

[0020] Figure 1 is the front view structural schematic diagram of the present invention;

[0021] Figure 2 is the structural schematic diagram of the positioning rod of the present invention;

[0022] Figure 3 is the structural schematic diagram of the positioning pin of the present invention;

[0023] Figure 4 is the structural schematic diagram of the positioning sleeve of the present invention;

[0024] Figure 5 is the present invention Figure 4 magnified structural schematic diagram at position A;

[0025] Figure 6 is the structural schematic diagram of the fixed block of the present invention;

[0026] Figure 7 is the structural schematic diagram of the driving component of the present invention;

[0027] Figure 8 is the structural schematic diagram of the turntable of the present invention;

[0028] Figure 9 is the structural schematic diagram of the limiting component of the present invention.

[0029] In the figure: 1, sleeve; 2, positioning rod; 201, positioning shaft sleeve; 3, positioning pin; 301, first spring; 4, first traction component; 401, first pulley; 402, first pulling rope; 403, first convex block; 5, second convex block; 501, clamping groove; 6, third convex block; 601, second spring; 7, positioning sleeve; 8, driving component; 801, rotating rod; 802, turntable; 803, sliding groove; 9, second traction component; 901, second pulley; 902, second pulling rope; 10, fixed block; 11, limiting component; 1101, ratchet; 1102, ratchet pawl; 1103, torsion spring; 12, drill press; 13, support block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Example 1, as Figures 1 to 5As shown in the figure, a hole machining device for rapid positioning of a flange plate includes a horizontally arranged workbench. On the left side of the top of the workbench, there is a flange support. The flange plate is rotatably connected to the flange support on the workbench. On the right side of the top of the workbench, there is a drilling machine 12. Below the drill bit of the drilling machine 12, there is a positioning plate. Inside the positioning plate, there is a positioning sleeve 7 fixedly installed. On the outside of the positioning sleeve 7, there is a positioning shaft sleeve 201. The positioning shaft sleeve 201 and the positioning sleeve 7 are fixed by a second convex block 5. On one side of the second convex block 5, there is a third convex block 6. On the other side of the second convex block 5, there is a first convex block 403. At one end of the first convex block 403 close to the second convex block 5, there is a first traction component 4. On the outside of the positioning shaft sleeve 201, there is a positioning rod 2 fixedly connected. At the end of the positioning rod 2 far from the positioning shaft sleeve 201, there is a sleeve 1. Inside the sleeve 1, there is a positioning pin 3 connected by a first spring 301. The top end of the positioning pin 3 is fixedly connected to the first traction component 4.

[0031] In this embodiment, the flange plate is placed on the flange support in advance, and the center positioning pin is installed. The flange plate and the flange support are rotatably connected together. This is the prior art and will not be elaborated here. The positioning sleeve 7 is coaxially arranged with the drill bit, and the inner diameter size of the positioning sleeve 7 is equal to the outer diameter size of the drill bit. The distance between the two through holes of the positioning rod 2 is calculated according to the diameter of the flange plate, the number of processed holes, and the positions of the processed holes. After the positioning rod 2 is processed, the outer diameter size of the positioning pin 3 here is equal to the inner diameter size of the positioning sleeve 7. Therefore, after the positioning rod 2 is processed, the positioning shaft sleeve 201 is rotatably installed on the outside of the positioning sleeve 7, and at the same time, the angular direction of the positioning rod 2 is roughly adjusted with the axis of the positioning shaft sleeve 201 as the center. At this time, the initial state of the positioning pin 3 almost completely retracts into the sleeve 1, and the bottom end of the positioning pin 3 is in contact with the upper surface of the flange plate.

[0032] Until the first hole is drilled in the flange plate, after the drill bit is driven by the drilling machine 12 to move upward, the flange plate is rotated, and then the positioning rod 2 is rotated with the positioning shaft sleeve 201 as the center to find the punching position of the second flange plate. When the positioning pin 3 is aligned with the first flange hole, the positioning pin 3 is driven by the elastic force of the first spring 301 to move downward, driving the first traction component 4 to pull the first convex block 403 to squeeze the second convex block 5 to move towards the third convex block 6, so that the second convex block 5 and the third convex block 6 are connected, fixing the positioning shaft sleeve 201 and the positioning sleeve 7. At this time, the angular orientation of the positioning rod 2 is limited.

[0033] Further, the first traction assembly 4 includes three first pulleys 401 and a first pulling rope 402. Two of the first pulleys 401 are rotatably connected to the positioning rod 2, with one located at the top of one side of the positioning rod 2 and the other located at the bottom of the other side of the positioning rod 2. The third first pulley 401 is rotatably connected to the sleeve 1. The first pulling rope 402 passes through the three first pulleys 401 in sequence. One end of the first pulling rope 402 penetrates through the sleeve 1 and is fixed to the positioning pin 3, and the other end penetrates through the positioning bushing 201 and is connected to the first convex block 403.

[0034] In this embodiment, when the rotary flange plate is rotated to align the positioning pin 3 with the first drilled hole, the positioning pin 3 moves towards the hole under the elastic force of the first spring 301. At this time, the movement of the positioning pin 3 drives the first pulling rope 402 to pull the first convex block 403 towards the second convex block 5.

[0035] Further, one side of the first convex block 403 close to the second convex block 5 is provided with an arc surface. Both sides of the second convex block 5 are provided with arc surfaces. The cross-sectional shape of the middle part on the outer side of the positioning sleeve 7 is trapezoidal. A clamping groove 501 is formed at the top of the second convex block 5. The third convex block 6 is connected to the positioning bushing 201 through a second spring 601. One side of the third convex block 6 close to the second convex block 5 is provided with an arc surface. The third convex block 6 is adapted to the clamping groove 501.

[0036] In this embodiment, when the first convex block 403 moves towards the second convex block 5 under the traction of the first pulling rope 402, the arc surface of the first convex block 403 squeezes the second convex block 5 to move towards the third convex block 6. The third convex block 6 contracts towards the second spring 601 under the extrusion of the second convex block 5 against the acting force of the second spring 601 until the second convex block 5 continues to move towards the third convex block 6 until the third convex block 6 aligns with the clamping groove 501. At this time, the third convex block 6 is snapped into the inside of the clamping groove 501 under the acting force of the second spring 601, so that the second convex block 5 and the third convex block 6 are fixed. At this time, the end of the second convex block 5 facing the positioning sleeve 7 tightly abuts against the arc surface position of the positioning sleeve 7, so that the relationship between the positioning bushing 201 and the positioning sleeve 7 changes from a rotatable connection to a fixed connection. It should be emphasized here that the elastic force of the first spring 301 is greater than the elastic force of the second spring 601.

[0037] Embodiment 2, as Figures 6 to 9 shown, a support block 13 is provided near the bottom of the flange plate. The support block 13 is arranged directly below the drill bit, and a through hole is formed at the top of the support block 13. The position of the through hole is on the same vertical line as the drill bit. Two groups of fixing blocks 10 are symmetrically arranged at the top of the flange plate. The two groups of fixing blocks 10 are driven by a driving assembly 8 to move up and down to clamp or release the flange plate.

[0038] unclamp the flange plate.

[0039] In this embodiment, a support block 13 is provided at the bottom of the flange plate near the punching position of the flange to prevent the flange from tilting during drilling, improve the punching accuracy, and further improve the stability and punching accuracy of the flange plate punching by clamping from the top of the flange with two groups of fixing blocks 10.

[0040] Further, the driving assembly 8 includes a rotating rod 801. The rotating rod 801 passes through the support plate and is rotationally matched with it. Two symmetrically arranged turntables 802 are fixedly connected to the outer side of the rotating rod 801. A chute 803 is formed on the turntable 802. The fixing block 10 is slidably connected to the inside of the chute 803; and one end of the fixing block 10 passes through the chute 803 and is slidably connected to the support plate.

[0041] After the flange plate is placed on the top of the support block 13, the rotating rod 801 can be rotated to drive the turntable 802 to rotate. The rotation of the turntable 802 causes the fixing block 10 to slide in the chute 803 and the chute of the support plate at the same time, and then the fixing block 10 can be driven to descend to clamp the upper and lower parts of the flange plate. Start the drill press 12 to start drilling the first hole on the flange plate. After the first hole is drilled, according to the same working principle, the rotating rod 801 can be rotated in the reverse direction to drive the fixing block 10 to lift upward, find the second punching point through the rotating positioning rod 2 and the flange plate, and fix the flange plate again with the fixing block 10.

[0042] Furthermore, a limiting assembly 11 is provided on the outer side of the rotating rod 801. The limiting assembly 11 includes a ratchet 1101. The ratchet 1101 is fixedly connected to the outer side of the rotating rod 801. A pawl 1102 is arranged on one side of the ratchet 1101. The pawl 1102 is fixed to the support rod through a torsion spring 1103. The support rod is fixedly connected to the support plate.

[0043] In this embodiment, when the rotating rod 801 is rotated to drive the fixing block 10 to move downward, at this time the ratchet 1101 rotates simultaneously with the rotating rod 801, and the ratchet 1101 can only rotate unidirectionally under the limitation of the pawl 1102. Therefore, after the fixing block 10 fixes the flange plate, the rotating rod 801 will not reverse. When releasing the fixation of the flange plate, the pawl 1102 is rotated. At this time, the ratchet 1101 loses the limitation of the pawl 1102, and then the rotating rod 801 can be rotated in the reverse direction to drive the fixing block 10 to move upward. After the fixing block 10 is reset, the pawl 1102 is reset under the action of the torsion spring 1103.

[0044] As a further solution of the present invention: The rotating rod 801 and the positioning pin 3 are connected by a second traction assembly 9. The second traction assembly 9 includes two second pulleys 901. One of the second pulleys 901 is rotatably connected to the positioning rod 2, and the other second pulley 901 is rotatably connected to the rotating rod 801 through a one-way damping bearing. A second pull rope 902 is sleeved outside the second pulley 901. One end of the second pull rope 902 is fixedly connected to the second pulley 901 outside the rotating rod 801, and the other end passes through the sleeve 1 and is fixedly connected to the top end of the positioning pin 3.

[0045] In this embodiment, after the second hole is drilled, the rotating rod 801 is rotated in the reverse direction to drive the fixing block 10 to move upward to release the flange plate. While the rotating rod 801 rotates in the reverse direction, it drives the second pulley 901 to rotate. Through the cooperation of the second pulley 901 and the second pull rope 902, the positioning pin 3 is pulled to move upward in the direction away from the first hole against the acting force of the first spring 301 until the positioning pin 3 disengages from the first hole. At this time, the flange can be continuously rotated. Since the angle of the positioning rod 2 has been determined when looking for the second opening, when the flange is rotated, when the second drilled hole is aligned with the positioning pin 3, the positioning pin 3 is inserted into the second drilled hole under the acting force of the first spring 301, and the third hole to be drilled is then located directly below the drill bit. And so on until all the holes on the flange are drilled;

[0046] It should be emphasized here that for the second pulley 901 outside the rotating rod 801, when the rotating rod 801 rotates forward to drive the fixing block 10 to descend, the second pulley 901 does not rotate at this time.

[0047] Furthermore, the length of the second pull rope 902 can be adjusted according to the distance from the punching position on the flange to the center point of the flange.

[0048] 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. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A hole processing device for rapid positioning of a flange plate, comprising a horizontally arranged workbench, a flange support is arranged on the left side of the top of the workbench, the flange plate is rotatably connected to the flange support on the workbench, a drilling machine (12) is arranged on the right side of the top of the workbench, and a positioning plate is arranged directly below the drill bit of the drilling machine (12), characterized in that: A positioning sleeve (7) is fixedly installed inside the positioning plate, a positioning shaft sleeve (201) is arranged outside the positioning sleeve (7), the positioning shaft sleeve (201) and the positioning sleeve (7) are fixed via a second protrusion (5), a third protrusion (6) is arranged on one side of the second protrusion (5), a first protrusion (403) is arranged on the other side of the second protrusion (5), and a first traction assembly (4) is arranged at one end of the first protrusion (403) close to the second protrusion (5); The outer side of the positioning sleeve (201) is fixedly connected to a positioning rod (2); one end of the positioning rod (2) away from the positioning sleeve (201) is fixedly connected to a sleeve (1); the interior of the sleeve (1) is connected to a positioning pin (3) via a first spring (301); the top end of the positioning pin (3) is fixedly connected to a first traction assembly (4); after the first hole is punched on the flange plate, the flange plate is rotated, and the positioning rod (2) is rotated with the positioning sleeve (201) as the axis, so that the positioning pin (3) is aligned with the first flange hole. The positioning pin (3) is moved downward by the elastic force of the first spring (301), driving the first traction assembly (4) to pull the first protrusion (403) to squeeze the second protrusion (5) and move it in the direction of the third protrusion (6), so that the second protrusion (5) and the third protrusion (6) are connected, and the positioning sleeve (201) and the positioning sleeve (7) are fixed.

2. A flange plate rapid positioning hole processing device according to claim 1, characterized in that: The first traction assembly (4) comprises three first pulleys (401) and a first pull rope (402), wherein two of the first pulleys (401) are rotatably connected to the positioning rod (2), one is located at the top of one side of the positioning rod (2), and the other is located at the bottom of the other side of the positioning rod (2), and the third first pulley (401) is rotatably connected to the sleeve (1); The first pull rope (402) passes through the three first pulleys (401) in sequence, and one end of the first pull rope (402) passes through the sleeve (1) and is fixed to the positioning pin (3), while the other end passes through the positioning sleeve (201) and is connected to the first protrusion (403).

3. The hole processing device for rapid positioning of flange plate according to claim 1, characterized in that: The side of the first protrusion (403) close to the second protrusion (5) is arranged as an arc surface, the two sides of the second protrusion (5) are arranged as arc surfaces, the cross-sectional shape of the middle part of the outer side of the positioning sleeve (7) is arranged as a trapezoid, and the top of the second protrusion (5) is provided with a slot (501); The third protrusion (6) is connected to the positioning sleeve (201) via a second spring (601), and a side of the third protrusion (6) close to the second protrusion (5) is configured as an arc surface. The third protrusion (6) is matched with the slot (501).

4. The hole processing device for rapid positioning of flange plate according to claim 1, characterized in that: A support block (13) is arranged near the bottom of the flange plate, the support block (13) is arranged directly below the drill bit, and a through hole is opened on the top of the support block (13), and the position of the through hole is on the same vertical line as the drill bit; Two groups of fixing blocks (10) are symmetrically arranged on the top of the flange plate, and the two groups of fixing blocks (10) are driven to rise and fall by a driving assembly (8) to clamp or release the flange plate.

5. A flange plate rapid positioning hole processing device according to claim 4, characterized in that: The driving assembly (8) comprises a rotating rod (801), the rotating rod (801) passes through the supporting plate and rotates with it, two groups of symmetrically arranged rotating disks (802) are fixedly connected to the outside of the rotating rod (801), the rotating disks (802) are provided with sliding grooves (803), and the fixed block (10) is slidably connected to the inside of the sliding grooves (803); One end of the fixed block (10) passes through the slide groove (803) and is slidably connected to the support plate.

6. A flange plate rapid positioning hole processing device according to claim 5, characterized in that: A limit assembly (11) is arranged on the outer side of the rotating rod (801), the limit assembly (11) comprising a ratchet (1101), the ratchet (1101) being fixedly connected to the outer side of the rotating rod (801), a pawl (1102) being arranged on one side of the ratchet (1101), the pawl (1102) being fixed to a support rod via a torsion spring (1103), and the support rod being fixedly connected to a support plate.

7. A flange plate rapid positioning hole processing device according to claim 6, characterized in that: The rotating rod (801) and the positioning pin (3) are connected via a second traction assembly (9), the second traction assembly (9) comprising two second pulleys (901), one of the second pulleys (901) being rotatably connected to the positioning rod (2), and the other second pulley (901) being rotatably connected to the rotating rod (801) via a one-way damping bearing, a second pull rope (902) being sleeved on the outer side of the second pulley (901), one end of the second pull rope (902) being fixedly connected to the second pulley (901) on the outer side of the rotating rod (801), and the other end of the second pull rope (902) passing through a sleeve (1) and being fixedly connected to the top end of the positioning pin (3).

8. The hole processing device for rapid positioning of flange plate according to claim 7, characterized in that: The length of the second pull rope (902) can be adjusted according to the distance from the flange punching position to the flange center point.

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