Machining center indexing and positioning device for flange bolt hole machining

Abstract

The invention discloses a machining center indexing and positioning device for flange bolt hole machining, and relates to the technical field of flange machining, in particular to a machining center body, a machining platform arranged in the machining center body in a sleeved mode, and a machine box installed at the top of the machining platform is arranged in the machining center body in a sleeved mode. An indexing positioning disc, an indexing rotating mechanism and a laser distance measuring sensor are arranged in the machine box in a sleeved mode. According to the machining center indexing positioning device for flange bolt hole machining, after the two clamping assemblies are arranged to automatically clamp and center a flange plate workpiece to be machined, a laser distance measuring sensor can conduct stroke detection on the flange plate workpiece which is rotationally driven by the indexing rotating mechanism; once the laser distance measuring sensor outputs the distance value between the laser distance measuring sensor and the bottom surface of the flange plate workpiece, the appearance size of the flange plate workpiece is unqualified, and the flange plate workpiece belonging to defective products is screened in time and is prevented from being continuously circulated and processed, so that the processing rate of the defective products is reduced, and meanwhile, raw materials are prevented from being wasted.

Description

Technical Field

[0001] This invention relates to the field of flange processing technology, specifically to a machining center indexing and positioning device for machining flange bolt holes. Background Technology

[0002] Flanges, also known as flanges or flanges, are mostly used for connecting shafts or pipe ends. In practice, two pipes, fittings or equipment are first fixed to a flange, then a flange gasket is placed between the two flanges, and finally the two flanges are fastened together with bolts to complete the connection. In this way, it is convenient to use and the assembled pipeline can withstand greater pressure. It is widely used in modern industrial equipment.

[0003] In recent years, with the continuous development of related technologies, the processing of bolt holes inside flanges is mostly completed by CNC machining centers with a higher degree of automation. However, during multiple batch processing processes, the applicant found that the indexing and positioning device currently used with CNC machining centers only considers the centering accuracy of the clamping mechanism in terms of positioning. It lacks pre-inspection conditions for defective workpieces with large dimensional tolerances. After the defective workpieces are drilled, the center of the arrangement of several bolt holes inside them differs greatly from the center of the defective workpiece, which will make it difficult to meet the requirements of subsequent relative assembly. This results in waste of raw materials and increases the processing rate of defective products. Summary of the Invention

[0004] This invention provides an indexing and positioning device for machining center for processing flange bolt holes, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a machining center indexing and positioning device for machining flange bolt holes, comprising a machining center body and a machining platform fitted inside the machining center body. The machining center body is fitted with a housing mounted on top of the machining platform. The housing is fitted with an indexing positioning disk, an indexing rotation mechanism, and a laser rangefinder. The indexing rotation mechanism includes a stepper motor, a reducer, and a conductive slip ring. The output end of the stepper motor is drivenly connected to the input end of the reducer, and the output end of the reducer passes through the conductive slip ring and is drivenly connected to the middle of the indexing positioning disk.

[0006] The top of the indexing positioning plate is respectively equipped with two clamping components in opposite positions and an arc-shaped relief groove in opposite positions. The center of the clamping range of the two clamping components overlaps with the center of the arc-shaped relief groove, and the flange workpiece that fits against the top surface of the indexing positioning plate is clamped between the two clamping components. The laser output by the laser range sensor can penetrate the arc-shaped relief groove and perform anti-obstruction detection on the side of the outer ring structure of the flange workpiece.

[0007] Preferably, both clamping assemblies include a first electric push rod and a V-shaped clamping plate. The housing structure of the first electric push rod is fixedly installed on the top surface of the indexing and positioning plate, and the output end of the first electric push rod is connected to the middle part of the V-shaped clamping plate. The conductive slip ring can be electrically connected to the two first electric push rods through wires, and the conductive slip ring is electrically connected to a controller installed on the front surface of the chassis through wires. The controller is electrically connected to the two first electric push rods, the laser rangefinder sensor, and the stepper motor through wires respectively. An auxiliary sleeve fixed to the inner wall of the top of the chassis is fitted on the outer side of the housing surface of the conductive slip ring.

[0008] Preferably, the housing surface of the laser rangefinder is fitted with a positioning bracket, and one side of the positioning bracket is fixed to the inner wall of the top of the chassis.

[0009] Preferably, the V-shaped clamp is internally fitted with a pressing mechanism, which includes a battery suction cup and an iron pressure plate. The battery suction cup can magnetically connect to the iron pressure plate and electrically connect to the controller via a wire. T-shaped rods are snapped into both sides of the iron pressure plate. The two ends of the T-shaped rods pass through the iron pressure plate and are fixed to the top of the V-shaped clamp and fitted with a return spring. The two ends of the return spring are fixed to the end surface of the T-shaped rod away from the V-shaped clamp and the top surface of the iron pressure plate, respectively.

[0010] Preferably, the indexing positioning plate is mounted in the structure at the top of the chassis via a bearing, and a sealing ring is fixedly fitted on the outer side of the bottom of the indexing positioning plate to fill and seal the gap between the indexing positioning plate and the chassis.

[0011] Preferably, the bottom of both arc-shaped relief grooves is provided with a sealing structure. The sealing structure includes an arc-shaped sealing plate that is in close contact with the bottom surface of the indexing positioning plate and a second electric push rod. The output end of the second electric push rod is connected to the middle of the arc-shaped sealing plate, and the second electric push rod is electrically connected to the controller through a wire. A support frame is installed between the housing surface of the second electric push rod and the inner wall of the top of the chassis. Under the drive of their respective second electric push rods, the two arc-shaped sealing plates can respectively cover and seal the bottom of the two arc-shaped relief grooves.

[0012] Preferably, a scale is installed on the top of the chassis, and the top surface of the scale has scale lines along the circumference of its inner ring structure. The top surface of the indexing positioning plate has a pointer slot, and the pointer slot can be used to confirm the position by cooperating with the scale lines on the top surface of the scale during the rotation and adjustment of the indexing positioning plate.

[0013] Preferably, the bottom of the indexing positioning plate has several indexing limiting holes along its own direction, and the inside of the chassis is equipped with several reset mechanisms. The reset mechanism includes a third electric push rod and a reset top rod. A limit bracket is installed between the housing surface of the third electric push rod and the corresponding side inner wall of the chassis, and the third electric push rod is electrically connected to the controller through a wire. The output end of the third electric push rod is drivenly connected to one end of the reset top rod. Under the drive of the third electric push rod, the reset top rod can engage and limit the corresponding indexing limiting hole.

[0014] Preferably, the corners of the open port of the indexing limiting hole and the end corners of the other end of the reset rod are provided with a slope structure, so that the reset rod and the indexing limiting hole are progressively fitted together.

[0015] Preferably, mounting plates are fixed on both sides of the bottom of the chassis, and the mounting plates have grooves, and several screws that can be threaded to the top structure of the chassis are fitted in the grooves.

[0016] The present invention has the following beneficial effects:

[0017] 1. This indexing and positioning device for machining center used for flange bolt hole processing is a multi-functional device consisting of a chassis, an indexing and positioning plate, two clamping components, a laser rangefinder, an arc-shaped clearance groove, and an indexing rotation mechanism. After the two clamping components automatically clamp and center the flange workpiece to be processed, the laser rangefinder can perform edge detection on the flange workpiece rotated by the indexing rotation mechanism. Once the laser rangefinder outputs the distance value between the laser rangefinder and the bottom surface of the flange workpiece, it indicates that the appearance dimensions of the flange workpiece are unqualified. This allows for timely screening and prevents defective flange workpieces from continuing to be processed, thereby reducing the defective product processing rate and avoiding waste of raw materials.

[0018] 2. The indexing and positioning device of the machining center for processing flange bolt holes uses two sets of sealing structures as auxiliary working conditions for the arc-shaped relief groove inside the indexing and positioning plate. After the flange workpiece is detected by the laser rangefinder, the second electric push rod in each of the two sets of sealing structures drives the arc-shaped sealing plate to seal and protect the corresponding arc-shaped relief groove, which meets the processing requirements of drilling holes while adding coolant to the flange workpiece and improves the processing quality of the bolt holes inside the flange workpiece.

[0019] 3. The indexing and positioning device for machining flange bolt holes uses multiple reset mechanisms and multiple indexing limit holes on the bottom of the indexing positioning plate for further linkage. After the indexing rotation mechanism drives the indexing positioning plate and two clamping components to perform one indexing rotation, the third electric push rod inside the multiple reset mechanisms drives the corresponding reset push rod to move upward synchronously, thereby causing the multiple reset push rods to engage and limit their respective indexing limit holes. This provides positioning protection for the indexing positioning plate after rotation adjustment, reducing loosening during subsequent drilling while ensuring the accuracy of the indexing positioning plate rotation adjustment.

[0020] 4. The indexing and positioning device of the machining center for machining flange bolt holes includes a pressing mechanism in its internal clamping assembly. After the two first electric push rods drive their respective V-shaped clamping plates to clamp and center the corresponding flange workpieces, the battery suction cup in the pressing mechanism can magnetically pull the iron pressure plate down to press the flange workpieces, eliminating the upward movement tendency of the clamped flange workpieces and improving the subsequent drilling quality of the flange workpieces. Attached Figure Description

[0021] Figure 1 This is a front view schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a front view of the chassis in the structure of the present invention;

[0023] Figure 3 This is a three-dimensional schematic diagram of the chassis in the structure of the present invention;

[0024] Figure 4 This is a top view of the indexing and positioning disk in the structure of the present invention;

[0025] Figure 5 This is a bottom view of the indexing rotation mechanism in the structure of the present invention;

[0026] Figure 6 This is a three-dimensional schematic diagram of the indexing rotation mechanism in the structure of the present invention;

[0027] Figure 7 This is a front view schematic diagram of the indexing rotation mechanism in the structure of the present invention;

[0028] Figure 8 This is a three-dimensional schematic diagram of the laser ranging sensor in the structure of the present invention;

[0029] Figure 9 This is a top view of the arc-shaped clearance groove in the structure of the present invention;

[0030] Figure 10 In the structure of this invention Figure 4 Enlarged view of point A in the middle;

[0031] Figure 11 This is a three-dimensional schematic diagram of the clamping component in the structure of the present invention;

[0032] Figure 12 This is a three-dimensional schematic diagram of the sealing structure in the present invention;

[0033] Figure 13 This is a three-dimensional schematic diagram of the reset mechanism in the structure of the present invention.

[0034] In the diagram: 1. Machining center body; 2. Machining platform; 3. Chassis; 4. Indexing and positioning plate; 5. Clamping assembly; 51. First electric push rod; 52. V-shaped clamping plate; 53. Battery suction cup; 54. Iron pressure plate; 55. T-shaped rod; 56. Return spring; 6. Stepper motor; 7. Reducer; 8. Conductive slip ring; 9. Laser rangefinder sensor; 10. Arc-shaped clearance groove; 11. Arc-shaped sealing plate; 12. Second electric push rod; 13. Controller; 14. Scale dial; 15. Pointer groove; 16. Indexing limit hole; 17. Third electric push rod; 18. Flange workpiece; 19. Return push rod. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1-10 , Figure 11 A machining center indexing and positioning device for machining flange bolt holes includes a machining center body 1 and a machining platform 2 housed inside the machining center body 1. A housing 3 mounted on top of the machining platform 2 is housed inside the machining center body 1. An indexing and positioning disk 4, an indexing rotation mechanism, and a laser rangefinder 9 are housed inside the housing 3. The indexing rotation mechanism includes a stepper motor 6, a reducer 7, and a conductive slip ring 8. The output end of the stepper motor 6 is connected to the input end of the reducer 7, and the output end of the reducer 7 passes through the conductive slip ring 8 and is connected to the middle of the indexing and positioning disk 4. This allows the indexing and positioning disk 4 and its top associated structure to rotate and adjust automatically, meeting the requirements of automated operation and improving work efficiency.

[0037] The top of the indexing positioning disk 4 is respectively equipped with two clamping components 5 in opposite positions and an arc-shaped relief groove 10 in opposite positions. The center of the clamping range of the two clamping components 5 overlaps with the center of the arc-shaped relief groove 10. The flange workpiece 18 that fits against the top surface of the indexing positioning disk 4 is clamped between the two clamping components 5. The laser output of the laser range sensor 9 can penetrate the arc-shaped relief groove 10 and perform anti-obstruction detection on the side of the outer ring structure of the flange workpiece 18. Then, the different output states of the laser range sensor 9 are used to perform appearance inspection on the flange workpiece 18 in the rotating state. The housing surface of the laser range sensor 9 is fitted with a positioning bracket, and one side of the positioning bracket is fixed to the inner wall of the top of the chassis 3, thereby ensuring the stability of the laser range sensor 9 in subsequent continuous use.

[0038] Both clamping components 5 include a first electric push rod 51 and a V-shaped clamping plate 52. The housing structure of the first electric push rod 51 is fixedly installed on the top surface of the indexing and positioning plate 4, and the output end of the first electric push rod 51 is connected to the middle part of the V-shaped clamping plate 52. The conductive slip ring 8 can be electrically connected to the two first electric push rods 51 through wires, thereby satisfying the requirement that the two clamping components 5 rotate synchronously with the indexing and positioning plate 4, ensuring the flexibility of the two clamping components 5 during use. The conductive slip ring 8 is electrically connected to a controller 13 installed on the front surface of the chassis 3 through wires. The controller 13 is electrically connected to the two first electric push rods 51, the laser rangefinder 9, and the stepper motor 6 through wires respectively. The controller 13 can uniformly control the two first electric push rods 51 and the laser rangefinder 9 to meet the needs of convenient operation. An auxiliary sleeve fixed to the inner wall of the top of the chassis 3 is fitted on the outer side of the housing surface of the conductive slip ring 8.

[0039] In use, the flange workpiece 18 is placed on the top surface of the indexing and positioning plate 4. Then, the two first electric push rods 51 are activated, causing their output ends to drive the corresponding V-shaped clamps 52 to center and clamp the flange workpiece 18. Next, the laser rangefinder 9 and the stepper motor 6 are activated by the controller 13. The stepper motor 6 drives the indexing and positioning plate 4, the flange workpiece 18, and the two clamping components 5 to rotate 360 ​​degrees through the reducer 7. At the same time, the laser rangefinder 9 traces the side of the flange workpiece 18 during its rotation. If the flange workpiece 18... If the external dimensions are qualified, the laser rangefinder 9 will only output one set of data, namely the distance value between the laser rangefinder 9 and the bottom surface of the indexing and positioning plate 4. If the external dimensions of the flange workpiece 18 are not qualified, the flange workpiece 18, which is held and limited by the two clamping components 5, will deviate from the predetermined center. Therefore, as the indexing and positioning plate 4 rotates, part of the side of the flange workpiece 18 will block the top of the laser rangefinder 9, thereby causing the laser rangefinder 9 to output two different sets of data, namely the distance value between the laser rangefinder 9 and the bottom surface of the indexing and positioning plate 4, and the distance value between the laser rangefinder 9 and the bottom surface of the flange workpiece 18.

[0040] After the above steps are completed, the pre-inspection of the flange workpiece 18 before processing is completed, and flange workpieces 18 with unqualified appearance dimensions are promptly screened out. For flange workpieces 18 that pass the pre-inspection, the machining center body 1 drills holes in the flange workpiece 18 at predetermined positions. After one bolt hole is processed, the stepper motor 6 is restarted by the controller 13, so that the stepper motor 6 drives the indexing positioning plate 4, the flange workpiece 18 and the two clamping components 5 to rotate at a specified angle through the reducer 7. That is, the next position to be processed of the flange workpiece 18 is rotated to the processing position of the machining center body 1. This process is repeated until all the bolt holes inside a flange workpiece 18 are processed. Then, the two first electric push rods 51 are closed, and the output ends of the two first electric push rods 51 drive their respective V-shaped clamps 52 to reset. The processed flange workpiece 18 is taken out, and the above steps are repeated for repeated operation.

[0041] Please see Figure 11 The V-shaped clamp 52 is internally fitted with a pressing mechanism, which includes a battery suction cup 53 and an iron pressure plate 54. The battery suction cup 53 can magnetically connect to the iron pressure plate 54 and electrically connect to the controller 13 through a wire, thereby achieving a unified control effect. T-shaped rods 55 are snapped into both sides of the iron pressure plate 54. The two ends of the T-shaped rods 55 pass through the iron pressure plate 54 and are fixed to the top of the V-shaped clamp 52 and fitted with a return spring 56. The two ends of the return spring 56 are fixed to the end surface of the T-shaped rod 55 away from the V-shaped clamp 52 and the top surface of the iron pressure plate 54, respectively.

[0042] In use, considering the upward tendency of the flange workpiece 18 after being clamped by the two clamping components 5, after the two first electric push rods 51 clamp and center the flange workpiece 18 by driving their respective corresponding V-shaped clamping plates 52, the controller 13 activates the two battery suction cups 53. The two battery suction cups 53 magnetically attract and guide their respective corresponding iron pressure plates 54, while the two downward-moving iron pressure plates 54 also press down on the flange workpiece 18, so that the bottom surface of the flange workpiece 18 is in contact with the top surface of the indexing and positioning plate 4, eliminating the upward tendency of the flange workpiece 18 and ensuring the quality of subsequent drilling.

[0043] Please see Figures 1-11 The indexing positioning plate 4 is mounted in the structure at the top of the housing 3 via a bearing, and a sealing ring is fixedly sleeved on the outer side of the bottom of the indexing positioning plate 4 to fill and seal the gap between the indexing positioning plate 4 and the housing 3. Thus, the sealing connection between the indexing positioning plate 4 and the housing 3 is guaranteed without interfering with the rotation of the indexing positioning plate 4.

[0044] Both arc-shaped clearance grooves 10 have a sealing structure at their bottoms. The sealing structure includes an arc-shaped sealing plate 11 that is in contact with the bottom surface of the indexing and positioning plate 4 and a second electric push rod 12. The output end of the second electric push rod 12 is connected to the middle part of the arc-shaped sealing plate 11, and the second electric push rod 12 is electrically connected to the controller 13 through a wire. A support frame is installed between the housing surface of the second electric push rod 12 and the inner wall of the top of the chassis 3. Under the drive of their respective second electric push rods 12, the two arc-shaped sealing plates 11 can respectively block and seal the bottom of the two arc-shaped clearance grooves 10, providing working conditions for subsequent coolant drilling.

[0045] When in use, considering that the synchronous addition of coolant during the drilling process is beneficial to improve the smoothness of the hole wall and reduce the friction speed of the corresponding drill bit, in addition to using the set sealing ring to fill and seal the gap between the chassis 3 and the indexing positioning plate 4 without interfering with the rotation of the indexing positioning plate 4;

[0046] After the flange workpiece 18 is pre-inspected by the laser rangefinder sensor 9 and other structures, the controller 13 activates the two second electric push rods 12, which drive the corresponding arc-shaped sealing plates 11 to move relative to each other until the bottom of the two arc-shaped relief grooves 10 are blocked and sealed by the two arc-shaped relief grooves 10 respectively. Thus, during the drilling of the flange workpiece 18 by the machining center body 1, coolant is added simultaneously. After the flange workpiece 18 is drilled, the coolant remaining in the two arc-shaped relief grooves 10 is cleaned out by an air gun, and then the flange workpiece 18 is disassembled.

[0047] Please see Figure 1 , Figures 12-13The top of the chassis 3 is equipped with a scale 14, and the top surface of the scale 14 is provided with scale lines along the circumference of its inner ring structure. The top surface of the indexing positioning disk 4 is provided with a pointer slot 15, and the pointer slot 15 can be used to confirm the position by cooperating with the scale lines on the top surface of the scale 14 during the rotation and adjustment of the indexing positioning disk 4.

[0048] The bottom of the indexing positioning plate 4 has several indexing limit holes 16 along its own direction, and the inside of the chassis 3 is equipped with several reset mechanisms, including a third electric push rod 17 and a reset top rod 19. A limit bracket is installed between the housing surface of the third electric push rod 17 and the corresponding side inner wall of the chassis 3 to ensure the stability of subsequent use. The third electric push rod 17 is electrically connected to the controller 13 through a wire to meet the requirements of unified control. The output end of the third electric push rod 17 is connected to one end of the reset top rod 19. Under the drive of the third electric push rod 17, the reset top rod 19 can engage and limit the corresponding indexing limit hole 16. The corners of the open port of the indexing limit hole 16 and the corners of the other end of the reset top rod 19 are all provided with a slope structure so that the reset top rod 19 and the indexing limit hole 16 are gradually fitted together to avoid hard impact.

[0049] In use, the reset mechanism is specifically set to three. After the stepper motor 6 drives the indexing positioning plate 4, the two clamping components 5 and the flange workpiece 18 to be processed to rotate and adjust to a specified angle through the reducer 7, the third electric push rod 17 inside the three reset mechanisms is activated. The output end of the third electric push rod 17 drives the corresponding reset push rod 19, so that the reset push rod 19 engages and limits with the corresponding indexing limit hole 16, thereby resetting and adjusting the rotated indexing positioning plate 4 again to ensure the indexing positioning accuracy of the indexing positioning plate 4. The position comparison between the pointer groove 15 and the scale 14 of the indexing positioning plate 4 after rotation adjustment can also reflect the accuracy of the indexing positioning plate 4 after rotation adjustment.

[0050] Please see Figure 1 Both sides of the bottom of the chassis 3 are fixed with mounting plates. The mounting plates have slots, and several screws that can be threaded to the top structure of the chassis 3 are installed in the slots.

[0051] When in use, considering the need for modular repair after damage to structures such as chassis 3 and indexing positioning plate 4, the mounting plates on both sides of the bottom of chassis 3 are fitted with screws and locked to the top of processing platform 2. This ensures that the chassis 3, indexing positioning plate 4 and other structures are stably installed on the top of processing platform 2, while maintaining convenient conditions for subsequent overall modular disassembly.

[0052] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machining center indexing and positioning device for machining flange bolt holes, comprising a machining center body (1) and a machining platform (2) fitted inside the machining center body (1), characterized in that: The machining center body (1) is internally fitted with a housing (3) installed on top of the machining platform (2). The housing (3) contains an indexing positioning disk (4), an indexing rotation mechanism, and a laser range sensor (9). The indexing rotation mechanism includes a stepper motor (6), a reducer (7), and a conductive slip ring (8). The output end of the stepper motor (6) is connected to the input end of the reducer (7), and the output end of the reducer (7) passes through the conductive slip ring (8) and is connected to the middle of the indexing positioning disk (4). The top of the indexing positioning disk (4) is respectively equipped with two clamping components (5) in opposite positions and an arc-shaped relief groove (10) in opposite positions. The center of the clamping range of the two clamping components (5) overlaps with the center of the arc-shaped relief groove (10), and the flange workpiece (18) that fits the top surface of the indexing positioning disk (4) is clamped between the two clamping components (5). The laser output by the laser ranging sensor (9) can penetrate the arc-shaped relief groove (10) and perform anti-obstruction detection on the side of the outer ring structure of the flange workpiece (18).

2. The indexing and positioning device for machining flange bolt holes according to claim 1, characterized in that: Both clamping components (5) include a first electric push rod (51) and a V-shaped clamping plate (52). The housing structure of the first electric push rod (51) is fixedly installed on the top surface of the indexing positioning plate (4), and the output end of the first electric push rod (51) is connected to the middle part of the V-shaped clamping plate (52). The conductive slip ring (8) can be electrically connected to the two first electric push rods (51) through wires, and the conductive slip ring (8) is electrically connected to a controller (13) installed on the front surface of the chassis (3) through wires. The controller (13) is electrically connected to the two first electric push rods (51), the laser range sensor (9) and the stepper motor (6) through wires respectively. An auxiliary sleeve fixed to the inner wall of the top of the chassis (3) is fitted on the outer side of the housing surface of the conductive slip ring (8).

3. The indexing and positioning device for machining flange bolt holes according to claim 1, characterized in that: The laser rangefinder (9) has a positioning bracket mounted on its housing surface, and one side of the positioning bracket is fixed to the inner wall of the top of the chassis (3).

4. The indexing and positioning device for machining flange bolt holes according to claim 2, characterized in that: The V-shaped clamp (52) is internally fitted with a pressing mechanism, which includes a battery suction cup (53) and an iron pressure plate (54). The battery suction cup (53) can magnetically connect to the iron pressure plate (54) and electrically connect to the controller (13) through a wire. T-shaped rods (55) are snapped into both sides of the iron pressure plate (54). The two ends of the T-shaped rods (55) pass through the iron pressure plate (54) and are fixed to the top of the V-shaped clamp (52) and fitted with a return spring (56). The two ends of the return spring (56) are fixed to the end surface of the T-shaped rod (55) away from the V-shaped clamp (52) and the top surface of the iron pressure plate (54).

5. The indexing and positioning device for machining flange bolt holes according to claim 1, characterized in that: The indexing positioning plate (4) is mounted in the structure at the top of the housing (3) by bearings, and a sealing ring is fixedly fitted on the outer side of the bottom of the indexing positioning plate (4) to fill and seal the gap between the indexing positioning plate (4) and the housing (3).

6. The indexing and positioning device for machining flange bolt holes according to claim 2, characterized in that: Both of the arc-shaped relief grooves (10) are provided with a sealing structure at the bottom. The sealing structure includes an arc-shaped sealing plate (11) that is in contact with the bottom surface of the indexing positioning plate (4) and a second electric push rod (12). The output end of the second electric push rod (12) is connected to the middle part of the arc-shaped sealing plate (11) and the second electric push rod (12) is electrically connected to the controller (13) through a wire. A support frame is installed between the housing surface of the second electric push rod (12) and the inner wall of the top of the chassis (3). The two arc-shaped sealing plates (11) can respectively block and seal the bottom of the two arc-shaped relief grooves (10) under the transmission of their respective second electric push rods (12).

7. The indexing and positioning device for machining flange bolt holes according to claim 1, characterized in that: The top of the chassis (3) is equipped with a dial (14), and the top surface of the dial (14) is provided with scale lines along the circumference of its inner ring structure. The top surface of the indexing positioning disk (4) is provided with a pointer slot (15), and the pointer slot (15) can cooperate with the scale lines on the top surface of the dial (14) for position confirmation reference during the rotation and adjustment process of the indexing positioning disk (4).

8. The indexing and positioning device for machining flange bolt holes according to claim 2, characterized in that: The bottom of the indexing positioning plate (4) is provided with several indexing limit holes (16) along its own direction, and the inside of the chassis (3) is equipped with several reset mechanisms. The reset mechanism includes a third electric push rod (17) and a reset top rod (19). The housing surface of the third electric push rod (17) is installed with a limit bracket between the corresponding side inner wall of the chassis (3), and the third electric push rod (17) is electrically connected to the controller (13) through a wire. The output end of the third electric push rod (17) is connected to one end of the reset top rod (19). The reset top rod (19) can be engaged and limited by the corresponding indexing limit hole (16) under the drive of the third electric push rod (17).

9. The indexing and positioning device for machining flange bolt holes according to claim 8, characterized in that: The corners of the open port of the indexing limiting hole (16) and the corners of the other end of the reset rod (19) are all provided with a slope structure, so that the reset rod (19) and the indexing limiting hole (16) are gradually fitted together.

10. The indexing and positioning device for machining flange bolt holes according to claim 1, characterized in that: The bottom of the chassis (3) is fixed with mounting plates on both sides. The mounting plates have slots and are fitted with screws that can be threaded to the top structure of the chassis (3).

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