Auxiliary laser centering device for centering and clamping iris of drilling machine

Abstract

The utility model provides an auxiliary laser centering device for centering and clamping an iris of a drilling machine. Comprising a laser transmitter, a shell, a base, a clamping iris, a sealing cover, a bolt, a tie bar and a rotating shaft, the shell is of a split combined structure and is formed by sequentially and concentrically assembling the outer sleeves together. The clamping iris is assembled in the outer sleeve and used for making contact with the drill bit and centering and locking the drill bit, and the clamping center of the clamping iris coincides with the center of the drill bit. The base and the outer sleeve are concentric, the base is assembled at one end of the shell, the laser transmitter is assembled at the center of the outer end, and the laser transmitter and the center of the shell are collinear; the sealing cover is concentric with the outer sleeve, is assembled at the other end of the shell and is used for accommodating the clamped iris in the shell; the bolt is used for assembling the base, the sealing cover and the outer sleeve together; the rotating shaft is arranged on the outer side of the shell and is used for combining the clamped irises to form a linkage structure; and one end of the tie bar is connected outside the jacket, and the other end is connected with the rotating shaft. The center point and the center line of the drill bit are indicated through laser.

Description

Technical Field

[0001] This utility model relates to drilling machine tooling in the field of machinery, and more particularly to a drilling machine iris centering clamping auxiliary laser centering device. Background Technology

[0002] Shipbuilding involves complex construction processes, diverse piping systems, and challenging operating environments. Construction often involves the fabrication and drilling of numerous pipes of various diameters and materials, blind flanges, and tooling. Before drilling begins, the workpieces must be clamped and the drilling location aligned with the center point of the drilling machine.

[0003] However, in the process of implementing the inventive technical solution in the embodiments of this application, the inventors of this application discovered that the above-mentioned technology has at least the following technical problems:

[0004] It is difficult to mark the center point and center line of a drilling machine. It is not easy to mark the center point of the drilling machine with a marker. If the center drill of the drilling machine is used for pre-drilling, a permanent indentation needs to be formed on the workpiece. Once the position of the pre-drilled point of the center drill needs to be adjusted, the indentation caused by the original workpiece will become a defect. If the old and new indentations are repeatedly drilled, they cannot be erased, causing confusion and easily producing indentation defects that lead to quality problems. At the same time, the center drill of the drilling machine can only drill the center point and cannot mark the center line. Summary of the Invention

[0005] To address the shortcomings of existing technologies and the difficulty in marking the center point and center line of a drilling machine, this application provides a laser centering device for iris-based clamping. This device connects a laser emitter concentrically to a housing. A concentric clamping iris is installed inside the housing to center and hold the drill bit. The drill bit and the laser emitter are collinear. Marking the center point / line with a marker using a laser dot / line is equivalent to marking the center point / line of the drilling machine. This improves work efficiency and avoids damage to the workpiece caused by secondary marking with a traditional center drill, thus solving the technical problem of the difficulty in marking the center point and center line of a drilling machine.

[0006] The solution adopted by the embodiments of this application to solve the technical problem is:

[0007] The iris centering clamping auxiliary laser alignment device for drilling machines includes a laser emitter, housing, base, clamping iris, cover, bolts, tie rods, and rotating shaft;

[0008] The laser emitter emits a crosshair laser source to confirm the center point / line of the drill press; the housing is a split, modular structure, with outer sleeves assembled concentrically, and the outer sleeves are hollow; the clamping iris is assembled in the outer sleeve to contact the drill bit and center and lock it, the clamping center of the clamping iris coincides with the center of the drill bit, and the center of the drill bit is collinear with the center of the outer sleeve; the base is concentric with the outer sleeve and assembled at one end of the housing, with the laser emitter mounted at its center on the outer end, and the laser emitter is collinear with the center of the housing; the cover is concentric with the outer sleeve and assembled at the other end of the housing, used to house the clamping iris in the housing, and the drill bit is inserted into the center of the clamping iris and housed in the inner cavity of the outer sleeve; bolts are used to assemble the base, cover, and outer sleeve together; the rotating shaft is located on the outside of the housing, used to assemble the clamping iris into a linkage structure; one end of the tie rod is connected to the outside of the outer sleeve, and the other end is connected to the rotating shaft, used to drive the rotating shaft;

[0009] The drill bit passes through the cover and is inserted into the inner cavity of the outer casing. The drill bit is centered and clamped by the clamping iris. The outer casing, laser emitter and drill bit are concentric. The center point and center line of the drill bit are indicated by the laser. The center point and center line of the drilling machine are marked directly according to the laser indication with a marker.

[0010] Positive effects: The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0011] 1. Because the embodiments of this application adopt a structure in which the outer casing and the clamping iris are concentrically connected and their centers are collinear, the clamping iris centers and clamps the drill bit and is concentric with the outer casing. The base is concentrically connected with the outer casing, and a laser emitter is set at the center of the base. That is, the outer casing, the laser emitter, and the drill bit are concentric. The drill bit, which is inserted into the inner cavity of the outer casing through the cover, is collinear with the center of the laser emitter mounted at the center of the base. The laser point / line emitted by the laser emitter is the center point / line of the drill bit. This effectively solves the technical problem that the center point and center line of the drill press are not easy to mark in the prior art. Marking the center point / line with a marker pen using the laser point / line is equivalent to marking the center point / line of the drill press. This achieves the technical effect of improving work efficiency and avoiding damage to the workpiece caused by secondary marking by traditional center drills.

[0012] 2. Because the embodiments of this application adopt the technical means of having an iris hole and a groove in the outer sleeve, the clamping iris can be concentrically embedded in the outer sleeve. The lever passes through the groove and controls the opening or closing of the clamping iris in the outer sleeve. This effectively solves the technical problem that the center point and center line of the drill press are not easy to mark in the prior art, and allows for quick insertion and removal and efficient centering. Thus, the technical effect of centering and clamping the drill bit by clamping the iris is achieved.

[0013] 3. Since the embodiment of this application adopts the technical means of a cone angle of 118° in the frustum, the center of the drill bit coincides with the center of the base when the drill bit is inserted, effectively solving the technical problem that the center point and center line of the drill press are not easy to mark in the prior art, and thus achieving the technical effect of the drill bit and the base being collinear.

[0014] It is suitable for use as an auxiliary laser centering device for iris centering and clamping of drilling machines. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a southeast isometric half-sectional view of this embodiment;

[0017] Figure 2 This is a half-section view of the southwest isometric view of this embodiment;

[0018] Figure 3 This is an exploded view of this embodiment;

[0019] Figure 4 This is a partial sectional view of the front view in this embodiment;

[0020] Figure 5 This is the southeast isometric view of the outer casing;

[0021] Figure 6 This is the southwest isometric view of the outer casing;

[0022] Figure 7 This is the southeast isometric view of the base;

[0023] Figure 8 This is the southwest isometric view of the base;

[0024] Figure 9 This is a front sectional view of the base;

[0025] Figure 10 A southwest isometric view of the clamped iris;

[0026] Figure 11 To clamp the iris's main view;

[0027] Figure 12 This is an isometric view of the blades and chassis from the southwest.

[0028] Figure 13 This is the northwest isometric view of the chassis.

[0029] Figure 14 This is the main view of the chassis;

[0030] Figure 15 This is the northwest isometric view of the blade;

[0031] Figure 16 This is the northeast isometric view of the blade;

[0032] Figure 17 To cover the southeast isometric view.

[0033] In the picture:

[0034] 1. Laser emitter;

[0035] 2. Outerwear

[0036] 21. Iris,

[0037] 22. Groove,

[0038] 23. First bolt through hole,

[0039] 24. Hanging lugs

[0040] 241. Round hole;

[0041] 3. Base

[0042] 31. Boss,

[0043] 311. Second bolt through hole,

[0044] 32. Frustum

[0045] 33. Laser emitter aperture,

[0046] 331. Bolt hole;

[0047] 4. Clamp the iris,

[0048] 41. Dial,

[0049] 411. Curved groove,

[0050] 412. Turn your hand.

[0051] 42. Leaf blade

[0052] 421. Pin,

[0053] 422. Keybar

[0054] 43. Chassis

[0055] 431. Keyway,

[0056] 432. Limit block;

[0057] 5. Seal the cap.

[0058] 51. Drill bit through hole,

[0059] 52. Third bolt through hole;

[0060] 6. Bolts;

[0061] 7. Stretching;

[0062] 8. Shaft. Detailed Implementation

[0063] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0064] According to the instruction manual Figure 1-4 As shown, the iris centering clamping auxiliary laser centering device for drilling machines includes a laser emitter 1, a housing, a base 3, a clamping iris 4, a cover 5, bolts 6, a tie rod 7, and a rotating shaft 8;

[0065] Laser emitter 1 is used to emit a crosshair laser source to confirm the center point / line of the drill press;

[0066] In this embodiment, the laser emitter 1 is a cylindrical crosshair laser source;

[0067] The shell is a modular structure, consisting of outer shell 2 assembled concentrically in sequence, and outer shell 2 is a hollow structure;

[0068] In this embodiment, there are three outer jackets 2;

[0069] The clamping iris 4 is assembled in the outer sleeve 2 and applies radial clamping force to the drill bit to contact the drill bit and center and lock it. The clamping center of the clamping iris 4 coincides with the center of the drill bit, and the center of the drill bit and the center of the outer sleeve 2 are collinear.

[0070] The base 3 and the outer casing 2 are concentric and are assembled at one end of the shell. A laser emitter 1 is assembled at the center of the outer end. The laser emitter 1 is collinear with the center of the shell.

[0071] The cap 5 is concentric with the outer sleeve 2 and is assembled at the other end of the housing. It is used to house the clamping iris 4 in the housing, and the drill bit is inserted into the center of the clamping iris 4 and housed in the inner cavity of the outer sleeve 2.

[0072] Bolt 6 is used to assemble base 3, cover 5 and outer sleeve 2 together;

[0073] The rotating shaft 8 is located on the outside of the housing and is used to assemble the clamping iris 4 into a linkage structure;

[0074] One end of the tie rod 7 is connected to the outside of the outer sleeve 2, and the other end is connected to the rotating shaft 8. It is used to pull the rotating shaft 8 to keep the clamping iris 4 in a closed state. The clamping iris 4 is released by moving it. When the drill bit is inserted, the clamping iris 4 is locked by the tension, which centers and clamps the drill bit.

[0075] The drill bit passes through the cover 5 and is inserted into the inner cavity of the outer sleeve 2. The drill bit is centered and clamped by the clamping iris 4. The outer sleeve 2, the laser emitter 1 and the drill bit are concentric. The center point and center line of the drill bit are indicated by the laser. The center point and center line of the drilling machine can be marked directly according to the laser indication with a marker pen. Therefore, the center point of the drilling machine does not need to be pre-drilled with a center drill to mark the center point of the drilling machine, which improves the accuracy and efficiency of drilling.

[0076] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0077] Since the outer sleeve 2 and the clamping iris 4 are concentrically connected, their centers are collinear. The clamping iris 4 centers and clamps the drill bit and is concentric with the outer sleeve 2. The base 3 is concentrically connected with the outer sleeve 2, and the laser emitter 1 is set at the center of the base 3. That is, the outer sleeve 2, the laser emitter 1 and the drill bit are concentric. Therefore, the drill bit inserted into the inner cavity of the outer sleeve 2 through the cover 5 is collinear with the center of the laser emitter 1 assembled at the center of the base 3. The laser point / line emitted by the laser emitter 1 is the center point / line of the drill bit. Then, the center point / line is marked with a marker pen through the laser point / line, which is equivalent to the center point / line of the drilling machine. This improves work efficiency and avoids the damage to the workpiece caused by the secondary marking of the traditional center drill.

[0078] To ensure the stability of the structure in this embodiment, please refer to the appendix to the specification. Figure 10-16 The clamping iris 4 can be an Archimedes spiral iris or other structures with a ring centering function;

[0079] Preferably, the iris clamping device 4 includes a dial 41, a blade 42, and a base 43;

[0080] The dial 41 is located on one side of the clamping iris 4. The dial 41 is a hollow disc. Curved grooves 411 are arranged in a circular array on the dial 41. A lever 412 is provided on the outer circumference of the dial 41. A rotating shaft 8 hole is provided in the middle of the lever 412 for connecting the rotating shaft 8 to form a linkage for clamping the iris 4.

[0081] The chassis 43 is located on the other side of the clamping iris 4. The chassis 43 is a hollow disc. Keyways 431 are arranged in a circular array on the chassis 43. Limiting blocks 432 are arranged between the keyways 431. The limiting blocks 432 and the keyways 431 are arranged alternately.

[0082] The blade 42 has a block-shaped structure with an arc at the tip for contacting the drill bit. A pin 421 is provided on one side of the blade 42, which matches the curved groove 411 of the dial 41 for mounting the blade 42 onto the dial 41. A key 422 is provided on the other side of the blade 42, which matches the keyway 431 of the base 43 for mounting the blade 42 onto the base 43. The pin 421 and the key 422 are located on the two sides of the blade and correspond to each other, located on the same radial line of the blade 42.

[0083] The blade 42 is assembled between the dial 41 and the base 43. The lever 412 on the dial 41 controls the opening or closing of the blade 42 and is radially limited by the limiting block 432 on the base 43. The diameter of the hollow part between the dial 41 and the base 43 is slightly larger than the diameter of the drill bit, leaving space for the drill bit to be elastically clamped.

[0084] Preferably, the curved groove 411 is an Archimedean spiral groove.

[0085] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0086] Since one end of the blade 42 is mounted in the curved groove 411 of the dial 41 via the pin 421 and the other end is mounted in the keyway 431 of the chassis 43 via the key bar 422, and the chassis 43 has a series of limiting blocks 432 that intersect with the keyway 431, when the lever 412 is turned, the blade 42 opens or closes around the center of the clamping iris 4, thus centering and clamping the object that passes through the center of the clamping iris 4.

[0087] To further ensure the stability of the structure in this embodiment, please refer to the appendix to the specification. Figure 5-6 The outer casing 2 includes an iris hole 21, a groove 22, a first bolt through hole 2323, and a lifting lug 24;

[0088] The iris hole 21 is located in the inner cavity of the outer sleeve 2 and is used to assemble and clamp the iris 4;

[0089] The groove 22 is provided at the end of the outer sleeve 2 for mounting the lever 412 in the clamping iris 4. The lever 412 extends outward through the groove 22 to control the clamping of the iris 4.

[0090] The first bolt through-hole 2323 is arranged in a circumferential array on the outer sleeve 2, for the bolt 6 to pass through and connect;

[0091] The lifting lug 24 is set on the outer circumference of the outer jacket 2. The lifting lug 24 has a round hole 241 for mounting the tie rod 7, so that the clamping iris 4 in each outer jacket 2 can be linked.

[0092] In this embodiment, there are six first bolt through holes 2323, which are evenly distributed.

[0093] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0094] Since the outer sleeve 2 has an iris hole 21 and a groove 22, the clamping iris 4 can be concentrically embedded in the outer sleeve 2. The lever 412 passes through the groove 22 and controls the opening or closing of the clamping iris 4 in the outer sleeve 2 to achieve centering and clamping of the drill bit.

[0095] To optimize the structure of this embodiment, please refer to the appendix to the specification. Figure 5-6 The base 3 has a stepped structure, including a boss 31, a cone 32 and a laser emitter hole 33;

[0096] The boss 31 is located in the middle of the base 3. The boss 31 has a second bolt through hole 311 arranged in a circular array. It is concentrically connected to the outer sleeve 2 by bolts 6.

[0097] The truncated cone 32 is located at the center of the upper part of the base 3 and extends into the inner cavity of the housing. The center of the truncated cone 32 is collinear with the center of the clamping iris 4. A tapered hole is provided at the center of the truncated cone 32 for contacting the drill bit for centering, axially positioning the drill bit, and bearing the axial force during drill bit insertion to prevent the drill bit from being eccentric.

[0098] The laser emitter hole 33 is located at the lower center of the base 3 and is used to assemble the laser emitter 1. The laser emitter 1 is a cylindrical crosshair laser light source. The laser emitter 1 is embedded in the laser emitter hole 33 and is fastened by screws installed through the bolt hole 331. The center of the laser emitter 1 is collinear with the center of the clamping iris 4.

[0099] As a conventional technique, the bottom of the tapered hole in the frustum 32 is provided with a cone angle of 118°, forming a centering cone pit in the frustum 32, so that the drill bit is centered and axially fixed.

[0100] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0101] Since the cone angle in the frustum 32 is 118°, the frustum 32 forms a centering cone pit. When the drill bit is inserted, the center of the drill bit coincides with the center of the base 3, thus achieving collinearity between the drill bit and the shell.

[0102] To further optimize the structure of this embodiment, please refer to the appendix to the specification. Figure 17 The cover 5 is a hollow disc-shaped structure, concentrically connected to the shell, including a drill bit through hole 51 and a third bolt through hole 52;

[0103] A drill bit through hole 51 is provided in the middle of the cover 5, which is used for the drill bit to pass through and enter the inner cavity of the housing, and to center and fasten the whole by clamping the iris 4; a third bolt through hole 52 is arranged in a circumferential array on the cover 5, which is used to connect and fix the cover 5 and the housing concentrically by bolts 6.

[0104] In this embodiment, the diameter of the drill bit through hole 51 is slightly larger than the diameter of the drill bit, leaving room for the drill bit to penetrate; there are six third bolt through holes 52, which are evenly distributed.

[0105] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0106] Because the cover 5 has a third bolt through hole 52 in the circumferential array, the cover 5 and the outer cover 2 are concentrically connected, ensuring that the cover 5 and the shell are concentric.

[0107] To further optimize the structure of this embodiment, the rotating shaft 8 is a linkage rod that passes through the rotating shaft 8 hole on the lever 412 in the clamping iris 4 in sequence, forming a linkage control for clamping the iris 4; the rotating shaft 8 has tie rod 7 holes arranged on it, and the tie rod 7 is connected to the rotating shaft 8.

[0108] To further optimize the structure of this embodiment, the tension bar 7 is a tension spring or a rubber band.

[0109] In this embodiment, the centers of the first bolt through hole 2323, the second bolt through hole 311, and the third bolt through hole 52 are collinear.

[0110] The working principle of this embodiment:

[0111] The clamping iris 4 is assembled in the outer casing 2, forming a linked centering clamping mechanism. The drill bit is inserted into one end of the casing, and the clamping force generated by the clamping iris 4 acts on the drill bit until the drill bit is centered and clamped. At this time, the center of the drill bit coincides with the center of the casing. At the same time, the laser emitter 1, which is mounted on the base 3 at the other end of the casing, is concentric with the casing. Thus, the laser point / line emitted by the laser emitter 1 is equivalent to the center point / line of the drill bit, thereby enabling the drill bit to be quickly inserted and removed, achieving laser centering.

[0112] It is worth noting that all contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of the laser emitter 1 are not specifically limited and can be determined using conventional equipment. Electrical control components not mentioned in this technical solution are existing technologies and are therefore not shown in the figures, and will not be described here.

[0113] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drilling machine iris centering clamping auxiliary laser centering device, characterized in that: it comprises a laser emitter (1), a shell, a base (3), a clamping iris (4), a cover (5), a bolt (6), a tension bar (7) and a rotating shaft (8); the laser emitter (1) is used for emitting a cross line laser source to confirm the center point / line of the drilling machine; the shell is a split combined structure, and the outer sleeve (2) is sequentially assembled together in a concentric manner; the outer sleeve (2) is a hollow structure; the clamping iris (4) is assembled in the outer sleeve (2) and used for contacting the drill bit and centering and locking the drill bit; the clamping center of the clamping iris (4) is coincided with the center of the drill bit, and the center of the drill bit is collinear with the center of the outer sleeve (2); the base (3) is assembled with the outer sleeve (2) in a concentric manner at one end of the shell, and the laser emitter (1) is assembled at the center of the outer end; the laser emitter (1) is collinear with the center of the shell; the cover (5) is assembled with the outer sleeve (2) in a concentric manner at the other end of the shell and used for storing the clamping iris (4) in the shell and storing the drill bit in the inner cavity of the outer sleeve (2); the bolt (6) is used for assembling the base (3), the cover (5) and the outer sleeve (2) together; the rotating shaft (8) is arranged outside the shell and used for combining the clamping iris (4) to form a linkage structure; the tension bar (7) is connected to the outer side of the outer sleeve (2) at one end and connected to the rotating shaft (8) at the other end and used for pulling the rotating shaft (8); wherein the drill bit is inserted into the inner cavity of the outer sleeve (2) through the cover (5) and centered and clamped by the clamping iris (4); the outer sleeve (2), the laser emitter (1) and the drill bit are concentric, and the center point and the center line of the drill bit are indicated by laser, and the center point and the center line of the drilling machine are directly marked by a marker according to the laser indication.

2. The drilling machine iris centering clamping auxiliary laser centering device according to claim 1, characterized in that: the clamping iris (4) comprises a dial (41), a blade (42) and a base plate (43); the dial (41) is arranged on one side of the clamping iris (4) and is a hollow disc, and curve grooves (411) are arranged in an array on the circumference of the dial (41); a knob (412) is arranged on the outer circumference of the dial (41), and a rotating shaft (8) hole is arranged in the middle of the knob (412) and used for connecting the rotating shaft (8) to form a linkage of the clamping iris (4); the base plate (43) is arranged on the other side of the clamping iris (4) and is a hollow disc, and key grooves (431) are arranged in an array on the circumference of the base plate (43); limit blocks (432) are arranged between the key grooves (431) and staggered with the key grooves (431). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The blade (42) is a block structure, and a circular arc is arranged at a tip for contacting a drill bit; a pin shaft (421) is arranged on one side of the blade (42), the pin shaft (421) is matched with a curved slot (411) of the dial plate (41), and the pin shaft (421) is used for assembling the blade (42) on the dial plate (41); a key bar (422) is arranged on the other side of the blade (42), the key bar (422) is matched with a key groove (431) of the bottom disc (43), and the key bar (422) is used for assembling the blade (42) on the bottom disc (43); the pin shaft (421) and the key bar (422) are respectively located on two sides of the blade and correspond to each other and are located on the same radial line of the blade (42); Wherein, the blade (42) is assembled between the dial plate (41) and the bottom disc (43), the knob (412) on the dial plate (41) controls the opening or closing of the blade (42), and the radial limiting is performed through the limiting block (432) on the bottom disc (43); the hollow of the dial plate (41) and the bottom disc (43) is slightly larger than the diameter of the drill bit, and a space for elastically clamping the drill bit is reserved.

3. The drilling machine iris centering and clamping auxiliary laser centering device according to claim 2, characterized in that: The curved slot (411) is an Archimedes spiral slot.

4. The drilling machine iris centering and clamping auxiliary laser centering device according to claim 2, characterized in that: The sleeve (2) comprises an iris hole (21), a groove (22), a first bolt through hole (23) and a lug (24); The iris hole (21) is arranged in the inner cavity of the sleeve (2) and is used for assembling the clamping iris (4); The groove (22) is arranged at the end of the sleeve (2) and is used for assembling the knob (412) of the clamping iris (4), the knob (412) extends outward through the groove (22) and is used for controlling the clamping iris (4); The first bolt through hole (23) is arranged in a circle on the sleeve (2) and is used for connecting the bolt (6) through; The lug (24) is arranged on the outer circle of the sleeve (2) and is provided with a round hole (241) for assembling the reinforcing rib (7) to link the clamping irises (4) in the sleeves (2).

5. The drilling machine iris centering and clamping auxiliary laser centering device according to claim 1, characterized in that: The base (3) is a stepped structure and comprises a boss (31), a conical table (32) and a laser emitter hole (33); The boss (31) is arranged in the middle of the base (3) and is provided with a second bolt through hole (311) in a circle on the boss (31), and the boss (31) is concentrically connected to the sleeve (2) through the bolt (6); The conical table (32) is arranged at the upper center of the base (3) and extends into the inner cavity of the shell, the center of the conical table (32) is collinear with the center of the clamping iris (4), a conical hole is arranged at the center of the conical table (32) and is used for contacting the drill bit to center the drill bit, axially position the drill bit and bear the axial force when the drill bit is inserted, and avoid the eccentricity of the drill bit. The laser emitter hole (33) is arranged in the lower center of the base (3) for assembling the laser emitter (1), the laser emitter (1) is a cylindrical cross line laser source, the laser emitter (1) is embedded in the laser emitter hole (33) and is fastened by the screw through the bolt hole (331), and the center of the laser emitter (1) is collinear with the center of the clamping iris (4).

6. The drill press iris centering and clamping auxiliary laser centering device according to claim 5, characterized in that: The bottom of the conical hole in the frustum (32) is provided with a taper angle, and the taper angle is 118°, forming a centering cone pit in the frustum (32), so that the drill bit is centered and axially fixed.

7. The drill press iris centering and clamping auxiliary laser centering device according to claim 1, characterized in that: The cover (5) is a hollow disc structure, which is concentrically connected with the shell, including a drill bit through hole (51) and a third bolt through hole (52); The drill bit through hole (51) is arranged in the middle of the cover (5) for the drill bit to pass into the inner cavity of the shell, and the whole is centered and fastened by the clamping iris (4); the third bolt through hole (52) is arranged in the circumferential array of the cover (5) for connecting and fixing the cover (5) and the shell concentrically by the bolt (6).

8. The drill press iris centering and clamping auxiliary laser centering device according to claim 2, characterized in that: The rotating shaft (8) is a linkage link, which passes through the rotating shaft (8) hole on the knob (412) of the clamping iris (4) in sequence to form the linkage control of the clamping iris (4); the tensioning rib (7) hole is arranged on the rotating shaft (8) to connect the tensioning rib (7) on the rotating shaft (8).

9. The drill press iris centering and clamping auxiliary laser centering device according to claim 1, characterized in that: The tensioning rib (7) is a tension spring or a rubber band.

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