A drilling apparatus for manufacturing a steel structural fitting

Abstract

The application discloses a kind of steel structure accessory manufacturing drilling equipment, including drill, the drill is mainly divided into motor and drill bit two parts, and drill bit is fixedly connected with motor output shaft by clamping mechanism;It also includes: the fixed disc of the shape is I-shaped setting, the motor is fixedly arranged at the center position of the bottom end of fixed disc, the outer circumferential side of the fixed disc is equipped with guiding mechanism.The improved steel structure component drilling machine can quickly and stably fix the device on any plane of large steel structure accessory as needed without holding operation or support installation operation by finding leverage point of large steel structure accessory, and the device can be completed by a single person, and when the device is drilling, the drill is inserted into the large steel structure accessory at a specific angle, and when the drill is jammed by metal debris, the jamming state of the drill is automatically released, and the device is small in size and easy to carry and install.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling equipment, in particular to a drilling equipment for steel structure accessory manufacturing. BACKGROUND

[0002] The steel structure accessory is a kind of accessory composed of steel material through welding, riveting or bolt connection, and when the steel structure accessory is produced, a proper number of holes are generally reserved at specific positions of the steel structure through a drilling machine to facilitate the installation operation in the later period, and when the large steel structure accessory is installed, due to the large size of part of the steel structure, the installation operation is complex, it is difficult to pre-set the installation hole, and sometimes temporary hole opening operation needs to be performed according to the on-site part cooperation.

[0003] For example, a drilling equipment for steel structure accessory manufacturing with publication number CN116000337A relates to the technical field of drilling devices. It includes a processing table, two end side surface near the top end of the processing table is fixedly installed with a mounting block, the bottom surface inside the processing table is fixedly installed with a connecting box, the two end side surface near the top end inside the processing table is fixedly installed with a rack seat, and the top surface inside the processing table is rotationally connected with a connecting table. Through the installation block assembly structure, the two pieces of tempered glass can be brought together during the drilling process of the steel structure accessory, thereby facilitating the workers to directly observe the drilling process while protecting their faces, and through the rack seat assembly structure, the drilling point of the drilling machine can be freely adjusted, the operation steps are simple, the drilling operation is accurate, the error is low, and the device structure can conveniently enable two workers to stand in position, which is convenient for teaching guidance and improves the drilling processing rate of the steel structure accessory.

[0004] When installing large steel structures, such as steel plates, due to their large size and numerous connected components, even minor errors in the installation of other components can lead to significant misalignments in the connection points with the large steel structure. Therefore, temporary drilling of some holes is necessary during installation. Because the large size of the steel structure makes it difficult to fit into commonly used drilling equipment, operators must use small drilling tools manually. Sometimes, operators may need to be hoisted to a suitable height to perform the drilling operation. This requires multiple operators to work together to keep the drilling equipment upright, or... Temporary support frames are needed to constrain and limit the drilling equipment to prevent the hole from tilting during drilling, which is very troublesome. If drilling at a high place, the limited space and few fulcrums make it difficult for the operator to effectively straighten the drilling equipment, and the installation of the support frame is also very troublesome, making the installation of the drilling equipment very difficult. At the same time, when the drill bit is drilling, the metal debris accumulated in the auger groove may cause great resistance to the rotation of the drill bit due to the accumulation and jamming of the metal debris, which may lead to the drill bit jamming, causing motor overload and affecting the use of the device. Summary of the Invention

[0005] The purpose of this invention is to provide a drilling device for manufacturing steel structure fittings, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drilling device for manufacturing steel structure accessories, comprising a drill, wherein the drill is mainly divided into two parts: a motor and a drill bit, and the drill bit is fixedly connected to the output shaft of the motor through a clamping mechanism;

[0007] Also includes:

[0008] The fixed disk is shaped like an I-beam, and the motor is fixedly installed at the center of the bottom end of the fixed disk. The outer periphery of the fixed disk is provided with a guide mechanism, which constrains the movement trajectory of the drill.

[0009] A positioning mechanism is installed below the drill bit, and a limiting component is provided between the fixed plate and the guide mechanism.

[0010] Preferably, the guiding mechanism includes a limiting ring, which is rotatably sleeved at the middle position of the outer periphery of the fixed disk. A plurality of balls are provided between the top side of the limiting ring and the fixed disk and between the bottom side of the limiting ring and the fixed disk. Annular grooves are provided on the top side of the fixed disk corresponding to the position of the balls, on the bottom side of the fixed disk corresponding to the position of the balls, and on the outer wall of the limiting ring corresponding to the position of the balls. The two ends of the balls are respectively inserted into the corresponding annular grooves.

[0011] By adopting the technical scheme, the ball and the annular groove are arranged to constrain the position between the fixing disc and the limiting ring, and greatly offset the friction between the fixing disc and the limiting ring, so that the excessive friction between the fixing disc and the limiting ring is prevented when the limiting ring is pulled, and the rotation between the fixing disc and the limiting ring is not affected.

[0012] Preferably, the bottom side of the limiting ring is fixedly provided with a guide rod through a bolt, and a guide cylinder is slidably arranged at the bottom of the guide rod.

[0013] By adopting the technical scheme, the guide rod and the guide cylinder are arranged to constrain the movement track of the drill, so that the drill moves vertically or horizontally, and the position deviation of the drill is prevented when the drill moves, thereby affecting the use of the device.

[0014] Preferably, the limiting assembly comprises a plurality of round rods, a plurality of T-shaped sliding grooves are arranged on the inner ring wall of the limiting ring, the round rods are slidably arranged in the corresponding sliding grooves, an arc-shaped groove is arranged on the outer peripheral wall of the fixing disc at the position corresponding to the sliding groove, one end of the round rod is rotatably provided with a spherical block, and the spherical block is inserted into the corresponding arc-shaped groove at the end outside the corresponding sliding groove.

[0015] By adopting the technical scheme, when the fixing disc and the limiting ring are subjected to a large torsion, the spherical block can be automatically extruded out of the arc-shaped groove, the constraint and limiting state between the fixing disc and the limiting ring is released, no other operation is required by the operator, the rotation of the ball can greatly reduce the wear rate of the device parts, and the service life of the device is prolonged.

[0016] Preferably, the top end of the limiting ring is fixedly provided with a ring pipe, a plurality of annular flow grooves are arranged on the outer peripheral side of the sliding grooves, the inner part of the flow groove and the inner part of the ring pipe are communicated through a plurality of conduits, a plurality of air pumps are fixedly arranged on the inner ring wall of the ring pipe, and the air inlet end of each air pump is inserted into the corresponding ring pipe.

[0017] By adopting the technical scheme, the ring pipe and the plurality of conduits are arranged, so that the plurality of air pumps can simultaneously suck air from the flow groove.

[0018] Preferably, the other end of the round rod is fixedly provided with a push plate, the push plate is in contact with the inner wall of the corresponding sliding groove, two sealing rings are arranged on the outer peripheral wall of the push plate, a sealing ring is arranged on the outer peripheral side of the round rod, and the inner part of the sliding groove is communicated with the inner part of the flow groove through a connecting hole.

[0019] By adopting the technical scheme, the connecting pipe, the flow groove and the ring pipe are arranged, so that the plurality of air pumps can simultaneously suck air from the plurality of sliding grooves, and the pressure in the plurality of sliding grooves can be kept in the same state.

[0020] Preferably, the bottom end of the guide rod is fixedly provided with a piston plate, and the outer peripheral wall of the piston plate is in contact with the inner wall of the corresponding guide cylinder; a soft tube is fixedly provided on the outer peripheral wall of the guide cylinder through a pressure limiting valve, and the top end of the soft tube is inserted into the flow guide groove and fixedly connected with the limiting ring.

[0021] By adopting the above technical scheme, the arrangement of the soft tube and the piston plate enables the air pump to simultaneously adjust the air pressure in the guide cylinder while adjusting the air pressure in the chute, thereby automatically controlling the guide rod to gradually retract into the guide groove, so that the drill bit is controlled to be inserted into the steel structure accessory without other operations by the operator.

[0022] Preferably, the positioning mechanism comprises a plurality of magnetic blocks, which are located at the center position in the bottom end opening of the corresponding guide cylinder and are fixedly connected with the inner wall of the corresponding guide cylinder through a plurality of supporting rods.

[0023] By adopting the above technical scheme, the arrangement of the magnetic blocks enables the guide cylinder to be attracted to the steel structure accessory, so that a positioning operation with small strength is performed without manual holding by the operator.

[0024] Preferably, the bottom end of the guide cylinder is provided with a storage groove arranged in the shape of a ring, a soft ring tube is provided in the storage groove in an interference fit with the inner wall of the corresponding storage groove, and the inside of the soft ring tube is filled with a filling liquid.

[0025] By adopting the above technical scheme, the arrangement of the storage ring leaves a deformation space for the soft ring tube, and the filling liquid filled in the inside of the soft tube enables the soft ring to deform to a greater extent, which facilitates the sealing of the gap between the guide tube and the steel structure accessory.

[0026] Compared with the prior art, the improved steel structure accessory drilling machine can quickly and stably fix the device on any plane of a large steel structure accessory as needed without holding the large steel structure accessory or installing a support by finding a leverage point, and the device can be used by a single person, and when the device is drilling, the drill bit is smoothly inserted into the large steel structure accessory at a specific angle, and when the drill bit is stuck by metal debris, the stuck state of the drill bit is automatically released.

[0027] 1, be provided with guide mechanism, limiting component and positioning mechanism, through the mutual cooperation of positioning mechanism and guide mechanism, can quickly and stably fix the device on any plane of large steel structure accessory, do not need to carry out the operation of large steel structure accessory, and make the drill with a specific angle to the direction of large steel structure accessory and move to carry out drilling operation, the device single person operation can not need to set up support and need not to find the support point, and the device installation groove operation is simple, small volume is convenient to carry and install, when the drill bit is blocked by metal debris, through the mutual cooperation of limiting component and guide mechanism, can make the drill bit present a certain degree of vibration state, and the mutually adhered metal is scattered, and the stuck state of the drill bit is released, and when the drill bit vibrates, through the mutual cooperation of limiting component and positioning mechanism, the positioning effect of the device can be intermittently enhanced, and the position of the device is prevented from affecting the drilling operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the whole schematic diagram of the application;

[0029] Figure 2 It is the internal structure schematic diagram of the fixed disc of the application;

[0030] Figure 3 It is the internal structure schematic diagram of the fixed disc of the application; Figure 2 It is the internal structure schematic diagram of the fixed disc of the application;

[0031] Figure 4 It is the internal structure schematic diagram of the fixed disc of the application; Figure 2 It is the internal structure schematic diagram of the fixed disc of the application;

[0032] Figure 5 It is the internal structure schematic diagram of the fixed disc of the application; Figure 2 It is the internal structure schematic diagram of the fixed disc of the application.

[0033] In the figure: 1, drill; 11, motor; 12, drill bit; 2, fixed disc; 3, guide mechanism; 31, limiting ring; 32, ball; 33, annular groove; 34, guide rod; 35, guide cylinder; 36, piston plate; 37, soft tube; 38, ring tube; 39, flow guide groove; 310, guide pipe; 311, air pump; 4, limiting component; 41, sliding groove; 42, round rod; 43, arc-shaped groove; 44, spherical block; 45, push plate; 46, sealing ring; 47, connecting hole; 48, sealing ring; 5, positioning mechanism; 51, magnetic block; 52, support rod; 53, storage groove; 54, soft ring tube. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0035] Please refer to Figures 1-3The application provides a drilling equipment for steel structure accessory manufacturing, which comprises a drill 1, the drill 1 is mainly divided into a motor 11 and a drill bit 12, the drill bit 12 is fixedly connected with the output shaft of the motor 11 through a clamping mechanism, the clamping mechanism is a connecting clamp between a hand drill body and a drill rod, and the drilling equipment further comprises a fixed disc 2 in the shape of an I-shaped section and a positioning mechanism 5, the motor 11 is fixedly arranged at the central position of the bottom end of the fixed disc 2, a guide mechanism 3 is arranged on the outer periphery of the fixed disc 2, and the guide mechanism 3 restricts the movement track of the drill 1. The guide mechanism 3 comprises a limiting ring 31, the limiting ring 31 is rotatably arranged at the middle position of the outer periphery of the fixed disc 2, a plurality of rolling balls 32 are arranged between the top side of the limiting ring 31 and the fixed disc 2 and between the bottom side of the limiting ring 31 and the fixed disc 2, respectively, annular grooves 33 are formed in the position corresponding to the rolling balls 32 on the top side of the fixed disc 2, in the position corresponding to the rolling balls 32 on the bottom side of the fixed disc 2 and on the outer wall of the limiting ring 31, respectively, the two ends of the rolling balls 32 are inserted into the corresponding annular grooves 33, respectively, a guide rod 34 is fixedly arranged on the bottom side of the limiting ring 31 through bolts, a guide cylinder 35 is slidably arranged at the bottom of the guide rod 34, a ring pipe 38 is fixedly arranged at the top end of the limiting ring 31, a plurality of sliding grooves 41 are arranged on the outer periphery of the ring pipe 38, annular flow grooves 39 are arranged in the shape of an annular section in the inner part of the ring pipe 38 and the inner part of the ring pipe 38, a plurality of guide pipes 310 are arranged in the inner part of the ring pipe 38 and the inner part of the ring pipe 38, respectively, a plurality of air pumps 311 are fixedly arranged on the inner ring wall of the ring pipe 38, the air inlet end of each air pump 311 is inserted into the corresponding ring pipe 38, the rate of air suction of the air pump 311 in the ring pipe 38 is controlled by a pressure sensor fixedly arranged in the ring pipe 38, a piston plate 36 is fixedly arranged at the bottom end of the guide rod 34, the outer periphery wall of the piston plate 36 is in contact with the inner wall of the corresponding guide cylinder 35, a soft pipe 37 is fixedly arranged on the outer periphery wall of the guide cylinder 35 through a pressure limiting valve, the top end of the soft pipe 37 is inserted into the flow groove 39 and is fixedly connected with the limiting ring 31, and the soft pipe 37 is a rubber pipe. The arrangement of the rolling balls 32 and the annular grooves 33 can restrict the position between the fixed disc 2 and the limiting ring 31, and greatly reduce the friction between the fixed disc 2 and the limiting ring 31, the arrangement of the guide rod 34 and the guide cylinder 35 can restrict the movement track of the drill 1, so that the drill 1 moves reciprocatingly in the vertical direction or the horizontal direction, the arrangement of the ring pipe 38 and the plurality of guide pipes 310 can make the plurality of air pumps 311 simultaneously suck air from the flow groove 39, the arrangement of the soft pipe 37 and the piston plate 36 can make the air pump 311 adjust the air pressure in the sliding groove 41 and simultaneously adjust the air pressure in the guide cylinder 35, thereby automatically controlling the guide rod 34 to gradually shrink into the guide groove, so as to control the drill bit 12 to be inserted into the steel structure accessory.

[0036] According to Figure 2 and Figure 5As shown, the positioning mechanism 5 is arranged below the drill 1. The positioning mechanism 5 comprises a plurality of magnetic blocks 51 which are located at the center of the opening at the bottom end of the corresponding guide cylinder 35 and are fixedly connected to the inner wall of the corresponding guide cylinder 35 through a plurality of supporting rods 52. The bottom end of the guide cylinder 35 is provided with a storage groove 53 which is annularly arranged. The cross section of the storage groove 53 is rectangularly arranged. A soft ring tube 54 is arranged in the storage groove 53 and is in interference fit with the inner wall of the corresponding storage groove 53. The inside of the soft ring tube 54 is filled with a filling liquid. The arrangement of the magnetic blocks 51 enables the guide cylinder 35 to be attracted to the steel structure accessory, thereby performing a positioning operation of small strength. The arrangement of the storage ring leaves a deformation space for the soft ring tube 54. The filling liquid filled in the soft tube 37 enables the soft ring to deform to a greater extent.

[0037] According to Figures 2-4 As shown, the limiting assembly 4 is arranged between the fixed disc 2 and the guide mechanism 3. The inner ring wall of the limiting ring 31 is oppositely provided with a plurality of T-shaped sliding grooves 41. The circular rods 42 are slidingly arranged in the corresponding sliding grooves 41. The outer peripheral wall of the fixed disc 2 is provided with an arc-shaped groove 43 at the position corresponding to the sliding groove 41. One end of the circular rod 42 is rotatably provided with a spherical block 44 which is inserted into the corresponding arc-shaped groove 43 at the end outside the sliding groove 41. The other end of the circular rod 42 is fixedly provided with a push plate 45 which is in contact with the inner wall of the corresponding sliding groove 41. The outer peripheral wall of the push plate 45 is oppositely provided with two sealing rings 46 which block the gap between the push plate 45 and the inner wall of the corresponding sliding groove 41. The outer peripheral side of the circular rod 42 is provided with a sealing ring 48 which blocks the gap between the circular rod 42 and the inner wall of the corresponding sliding groove 41. The inside of the sliding groove 41 is connected to the inside of the flow guide groove 39 through a connecting hole 47. The exhaust end of the connecting hole 47 is located at the side of the push plate 45 close to the corresponding circular rod 42. The arrangement of the spherical block 44 and the arc-shaped groove 43 enables the spherical block 44 to be automatically extruded out of the arc-shaped groove 43 when the fixed disc 2 and the limiting ring 31 are subjected to a large torsion force, thereby releasing the constraint and limiting state between the fixed disc 2 and the limiting ring 31. The rotation of the ball 32 can greatly reduce the wear rate of the device parts. The arrangement of the connecting pipe, the flow guide groove 39 and the ring tube 38 enables the plurality of air pumps 311 to simultaneously suck air from the plurality of sliding grooves 41, so that the pressure in the plurality of sliding grooves 41 remains the same.

[0038] Working principle: when drilling large steel structure parts, the device is placed on the large steel structure parts, and the bottom opening of the guide pipe is in contact with the surface of the large steel structure parts. Due to the attraction between the magnetic block 51 and the large steel structure parts, the magnetic block 51 moves towards the large steel structure parts and adheres to the surface of the large steel structure parts. At this time, the bottom of the guide pipe is in contact with the surface of the large steel structure parts, the soft ring tube 54 deforms and shrinks into the storage groove 53, and the soft ring tube 54 tightly adheres to the surface of the large steel structure parts to block the gap between the guide pipe and the large steel structure parts. At the same time, the device is constrained and positioned on the large steel structure parts. Then push the guide pipe. With the sliding of the guide pipe on the surface of the large steel structure parts, the position of the drill bit 12 can be adjusted, so that the drill bit 12 is aligned with the drilling position;

[0039] Then start the air pump 311 to extract the gas in the ring tube 38 at a certain rate, and as the gas pressure in the ring tube 38 decreases, the pressure sensor controls the rate of gas extraction by the air pump 311 to gradually decrease until stopping the extraction of gas, so that the resistance between the drill bit 12 and the steel structure parts remains relatively stable;

[0040] As the air pump 311 gradually extracts the gas in the ring tube 38, a negative pressure state is formed in the ring tube 38. At this time, the gas in the guide groove 39 flows into the ring tube 38 from the guide pipe 310 to supplement the gas in the ring tube 38, and as the gas in the guide groove 39 is lost, a negative pressure state is formed in the guide groove 39, so that the gas in the sliding groove 41 flows into the guide groove 39 from the connecting hole 47 to supplement the gas in the guide groove 39, so that a negative pressure state is formed in the sliding groove 41, and the side of the push plate 45 that forms a negative pressure pulls the push plate 45 towards the opening direction of the sliding groove 41, and then the spherical block 44 is pushed by the round rod 42 to move towards the arc-shaped groove 43, increasing the resistance between the ball 32 and the spherical block 44;

[0041] At the same time, the gas in the guide pipe flows into the guide groove 39 from the soft tube 37 to supplement the gas in the guide groove 39, so that a negative pressure state is formed in the guide pipe. The negative pressure state formed in the guide pipe makes the guide pipe and the large steel structure parts form a certain adsorption force, which enhances the connection strength between the guide pipe and the large steel structure parts, and pulls the piston plate 36 towards the guide pipe, so that the guide rod 34 moves towards the guide pipe;

[0042] Then the motor 11 is started to drive the drill bit 12 to rotate and carry out the drilling operation of the large steel structure accessory. According to the above, as the air pump 311 gradually extracts the gas in the flow guide groove 39, the guide rod 34 gradually retracts into the guide pipe, thereby pulling the limiting ring 31 and the fixed disc 2 to move towards the large steel structure accessory through the guide rod 34, and further making the drill bit 12 gradually inserted into the large steel structure accessory to carry out the drilling operation of the large steel structure accessory, and making the drill bit 12 have enough resistance with the large steel structure accessory. When the air pump 311 stops extracting the gas, the resistance between the drill bit 12 and the large steel structure accessory reaches the maximum value;

[0043] It should be noted that when the guide rod 34 pulls the limiting ring 31 towards the large steel structure accessory, due to the mutual resistance of the ball 32 and the inner wall of the annular groove 33, the fixed disc 2 and the limiting ring 31 will not cause the friction between the fixed disc 2 and the limiting ring 31 to rapidly increase due to the increase of the resistance, and with the rotation of the ball 32 in the annular groove 33, the fixed disc 2 and the limiting ring 31 can still rotate easily;

[0044] When the drill bit 12 is blocked by the debris, the motor 11 cannot drive the drill bit 12 to rotate, thereby causing a large torsion between the fixed disc 2 and the limiting ring 31, and causing enough resistance between the spherical block 44 and the inner wall of the arc-shaped groove 43. With the rotation of the spherical block 44, the spherical block 44 is extruded out of the arc-shaped groove 43, automatically releasing the constraint and limiting state between the fixed disc 2 and the limiting ring 31. At this time, the fixed disc 2 rotates in the limiting ring 31;

[0045] It should be noted that with the extrusion of the spherical block 44 out of the annular groove 33, the push plate 45 is simultaneously pushed into the sliding groove 41, so that the space between the push plate 45 and the sealing ring 48 is increased, further increasing the negative pressure in the sliding groove 41, the guide pipe and the ring pipe 38, thereby further enhancing the connection strength between the guide pipe 35 and the large steel structure accessory, preventing the device from vibrating due to the rotation between the fixed disc 2 and the limiting ring 31;

[0046] When the spherical block 44 is re-aligned with the arc-shaped groove 43, according to the above, due to the pulling of the push plate 45 by the negative pressure in the sliding groove 41, the spherical block 44 is re-inserted into the arc-shaped groove 43, thereby re-recovering the constraint and limitation between the fixed disc 2 and the limiting ring 31. According to the above, with the repeated re-insertion of the spherical block 44 into the arc-shaped groove 43, due to the impact between the spherical block 44 and the inner wall of the arc-shaped groove 43, the fixed disc 2 and the drill bit 12 vibrate, at the same time, the motor 11 intermittently drives the drill bit 12, so that the drill bit 12 screw groove surface and the metal debris form repeated resistance and impact, finally the metal debris accumulated and attached in the drill bit 12 screw groove are scattered by mutual resistance, thereby removing the resistance and limitation of the metal debris on the drill bit 12, and making the drill bit 12 recoverable;

[0047] As the air pump 311 continuously extracts the gas in the ring pipe 38, the drill bit 12 gradually inserts into the large steel structure accessory until the drilling operation at the specific position of the large steel structure accessory is completed. After the drilling operation is completed, the air pump 311 is started to inject air into the ring pipe 38, that is, the negative pressure state in the guide pipe is released, and the device is directly pulled off the large steel structure accessory to complete the disassembly operation of the device.

[0048] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0049] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A drilling equipment for manufacturing steel structure accessories, comprising a drill (1), which is mainly divided into a motor (11) and a drill bit (12), and the drill bit (12) is connected with the output shaft of the motor (11) through a clamping mechanism; characterized in that Further comprising: a fixed disc (2) arranged in an I-shaped manner, the motor (11) is fixed at the central position penetrating the bottom end of the fixed disc (2), and a guide mechanism (3) is arranged on the outer circumferential side of the fixed disc (2), and the guide mechanism (3) restricts the movement track of the drill (1); a positioning mechanism (5) arranged below the drill (1), a limiting assembly (4) is arranged between the fixed disc (2) and the guide mechanism (3); the guide mechanism (3) comprises a limiting ring (31), an annular groove is formed on the circumferential side wall of the fixed disc (2), forming an "I" shaped structure, the limiting ring (31) is rotatably sleeved at the middle position of the outer circumferential side of the fixed disc (2), a plurality of balls (32) are arranged on the top side and the bottom side of the limiting ring (31) relative to the fixed disc (2), annular grooves (33) are formed on the top side of the fixed disc (2) corresponding to the positions of the balls (32), the bottom side of the fixed disc (2) corresponding to the positions of the balls (32), and the outer wall of the limiting ring (31) corresponding to the positions of the balls (32), and the two ends of the balls (32) are respectively inserted into the corresponding annular grooves (33); the bottom side of the limiting ring (31) is fixedly provided with a guide rod (34) through bolts, and the bottom of the guide rod (34) is slidingly provided with a guide cylinder (35); the limiting assembly (4) comprises a plurality of round rods (42), a plurality of T-shaped sliding grooves (41) are formed on the inner ring wall of the limiting ring (31), and the round rods (42) are slidingly arranged in the corresponding sliding grooves (41), arc-shaped grooves (43) are formed on the outer circumferential wall of the fixed disc (2) corresponding to the positions of the sliding grooves (41), one end of the round rod (42) is rotatably provided with a spherical block (44), and the end of the spherical block (44) located outside the corresponding sliding groove (41) is inserted into the corresponding arc-shaped groove (43); the top end of the limiting ring (31) is fixedly provided with a ring pipe (38), the outer circumferential side of the sliding groove (41) is provided with a ring-shaped flow guide groove (39), the inner part of the flow guide groove (39) and the inner part of the ring pipe (38) are connected through a plurality of conduits (310), and a plurality of air pumps (311) are fixedly arranged on the inner ring wall of the ring pipe (38), and the exhaust end of each air pump (311) is inserted into the corresponding ring pipe (38); the other end of the round rod (42) is fixedly provided with a push plate (45), and the push plate (45) is in contact with the inner wall of the corresponding sliding groove (41), two sealing rings (46) are arranged on the outer circumferential wall of the push plate (45), a sealing ring (48) is sleeved on the outer circumferential side of the round rod (42), and the inner part of the sliding groove (41) is connected with the inner part of the flow guide groove (39) through a connecting hole (47). The bottom end of the guide rod (34) is fixedly provided with a piston plate (36), the outer peripheral wall of the piston plate (36) is in contact with the inner wall of the corresponding guide cylinder (35), the outer peripheral wall of the guide cylinder (35) is fixedly provided with a soft pipe (37), and the top end of the soft pipe (37) is inserted into the flow guide groove (39) and fixedly connected with the limiting ring (31).

2. The hole drilling apparatus for manufacturing a steel structural fitting according to claim 1, characterized by: The positioning mechanism (5) comprises a plurality of magnetic blocks (51), the magnetic blocks (51) are located at the central position in the bottom end opening of the corresponding guide cylinder (35), and the magnetic blocks (51) are fixedly connected with the inner wall of the corresponding guide cylinder (35) through a plurality of supporting rods (52).

3. A hole drilling apparatus for manufacturing a steel structural fitting according to claim 2, characterized in that: The bottom end of the guide cylinder (35) is provided with a storage groove (53) in the shape of an annular structure, the storage groove (53) is provided with a soft ring pipe (54) in the shape of an annular structure, the soft ring pipe (54) is in interference fit with the inner wall of the corresponding storage groove (53), and the soft ring pipe (54) is filled with a filling liquid.

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