Magnetic clamping auxiliary laser centering device for drilling machine

Abstract

The utility model provides a magnetic clamping auxiliary laser centering device for a drilling machine. Comprising a laser transmitter, a magnetic shell, an end cover, a bolt, a sealing cover, a supporting block, a clamping claw and a limiting ring. The supporting block is of a split type combined structure and comprises a first supporting block body, a second supporting block body and a third supporting block body, the lower portion of the third supporting block body extends out of the magnetic shell, a laser transmitter is assembled in the center of the third supporting block body, and the laser transmitter and the center of the supporting block are collinear; the gripper jaw is arranged in a spacing cavity of the supporting block, and repulsive magnetic force is in contact with the drill bit and centered and locked; the limiting ring is assembled on the supporting block to limit the clamping jaw; the end cover is concentric with the magnetic shell and assembled at one end of the magnetic shell, the supporting blocks are contained in the magnetic shell, and the laser transmitter assembled at the extending position of the third supporting block extends out of the magnetic shell. The sealing cover is concentric with the magnetic shell and assembled at the other end of the magnetic shell; and the bolt is used for detachably assembling the end cover and the sealing cover on the magnetic shell. The center point and the center line of the drill bit are indicated through laser.

Description

TECHNICAL FIELD

[0001] The utility model relates to the drilling machine field's drilling machine frock especially relates to drilling machine magnetic clamping auxiliary laser centering device. BACKGROUND

[0002] The ship building field construction is complex, the pipe system diversity, the operation environment is complex. The construction involves the processing drilling of a plurality of caliber, the pipe, the blind plate, frock and the quantity is larger, before the drilling machine work, the workpiece needs to be clamped and makes the opening position adjustment to be the drilling machine center point position.

[0003] But the present application inventor in the process of realizing the application embodiment invention technical scheme, found that the above technology at least has following technical problem:

[0004] Drilling machine center point, center line position line marking is difficult, the marker pen line point and the drilling machine center point position is not easy to mark, if adopting the drilling machine center drill pre-punching mark needs to form permanent concave point on the workpiece, once the center drill pre-punching point needs to be adjusted then the concave point caused by the original workpiece is the defect, if repeatedly punching new and old concave point is not erasable causes confusion and easily produces concave point defect produces quality problem, at the same time, the drilling machine center drill can only punch the center point and cannot mark the center line. SUMMARY

[0005] In order to solve the existing technical problems, the drilling machine magnetic clamping auxiliary laser centering device is provided to solve the problem of drilling machine center point and center line marking. The device is connected with the magnetic shell concentrically through the laser emitter, the drill bit is collinear with the laser emitter center, and the center point / line is marked by the laser point / line with the marker pen, which is the same as the center point / line of the drilling machine. The working efficiency is improved, and the damage to the workpiece caused by the traditional center drill secondary punching is avoided. The technical problem of drilling machine center point and center line marking is solved.

[0006] The application embodiment adopts the following technical scheme to solve the technical problem:

[0007] The drilling machine magnetic clamping auxiliary laser centering device comprises a laser emitter, a magnetic shell, an end cover, a bolt, a cover, a support block, a clamping jaw and a limiting ring.

[0008] The laser emitter is used for emitting a cross line laser light source to confirm the center point / line of the drilling machine; the magnetic shell has a hollow cylindrical structure and is magnetic; the support block is concentrically assembled in the magnetic shell and has a split type combined structure, including a first support block, a second support block and a third support block, the lower part of the third support block extends out of the magnetic shell, and the laser emitter is assembled at the center of the third support block and is collinear with the center of the support block; the clamping jaw is arranged in the interval cavity of the support block, and the repulsive magnetic force is formed in the magnetic shell to apply a radial clamping force to the drill bit for contacting and centering and locking the drill bit, the clamping center of the clamping jaw coincides with the center of the drill bit, and the center of the laser emitter is collinear with the center of the drill bit; the limiting ring is assembled on the support block to limit the clamping jaw; the end cover is concentric with the magnetic shell and is assembled at one end of the magnetic shell to accommodate the support block in the magnetic shell, and the laser emitter assembled at the extension of the third support block protrudes out of the magnetic shell; the cover is concentric with the magnetic shell and is assembled at the other end of the magnetic shell to accommodate the support block in the magnetic shell, and the drill bit is inserted into the center of the clamping jaw to accommodate the drill bit in the inner cavity of the support block; the bolt is used for detachably assembling the end cover and the cover on the magnetic shell.

[0009] Wherein, the drill bit passes through the cover and is inserted into the inner cavity of the support block, and the drill bit is centered and clamped by the clamping jaw in the support block; the magnetic shell, the laser emitter and the drill bit are concentric, the center point and the center line of the drill bit are indicated by the laser, and the center point and the center line of the drilling machine are directly marked by a marker pen according to the laser indication.

[0010] The technical scheme provided in the embodiment of the application has at least the following technical effects or advantages:

[0011] 1. Since the support block and the magnetic shell are concentrically connected in the embodiment of the application, the center of the two is collinear, the drill bit is centered and clamped by the clamping jaw and is concentric with the support block, i.e. the magnetic shell, the laser emitter and the drill bit are concentric, the drill bit inserted into the inner cavity of the support block through the cover is collinear with the center of the laser emitter assembled on the center of the laser mounting seat, the laser point / line emitted by the laser emitter is the center point / line of the drill bit, the technical problem that the center point and the center line of the drilling machine are not easy to mark in the prior art is effectively solved, the center point / line marked by the laser point / line is equivalent to the center point / line of the drilling machine, and the technical effect of improving work efficiency and avoiding damage to the workpiece caused by traditional center drilling twice is achieved.

[0012] 2. Since the clamping jaw is arranged in a circular array in the embodiment of the application, the technical problem that the center point and the center line of the drilling machine are not easy to mark in the prior art is effectively solved, and the technical effect that the center of the clamping jaw coincides with the center of the magnetic shell is achieved.

[0013] 3. The blind hole drilling angle is 118°, the center of the drill bit coincides with the center of the magnetic shell when the drill bit is inserted, the technical problem of the center point and center line of the drilling machine being difficult to mark in the prior art is solved, and the technical effect of the drill bit and the magnetic shell being collinear is realized.

[0014] 4. The sliding block is provided with a circular arc part, the clamping jaw is connected concentrically with the magnetic shell, the technical problem of the center point and center line of the drilling machine being difficult to mark in the prior art is solved, and the technical effect of the clamping jaw and the magnetic shell being concentric is realized.

[0015] 5. The plunger is assembled in the sliding block, the radial force is formed through the plunger, the technical problem of the center point and center line of the drilling machine being difficult to mark in the prior art is solved, the laser point / line emitted by the laser emitter is the center point / line of the drill bit, and the technical effect of the laser emitter is realized.

[0016] It is suitable to be used as a magnetic clamping auxiliary laser centering device of a drilling machine. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a southeast isometric half-sectional view of the embodiment;

[0019] Figure 2 It is a southwest isometric half-sectional view of the embodiment;

[0020] Figure 3 It is an explosion view of the embodiment;

[0021] Figure 4 It is a front half-sectional view of the embodiment;

[0022] Figure 5 It is a southeast isometric view of the first support block, the second support block, the circular ring and the clamping jaw;

[0023] Figure 6 It is a southwest isometric view of the first support block, the second support block, the circular ring and the clamping jaw;

[0024] Figure 7 It is a first support block structure schematic view;

[0025] Figure 8 is a schematic view of a second support block structure;

[0026] Figure 9 is a southeast isometric view of a third support block;

[0027] Figure 10 is a southwest isometric view of a third support block;

[0028] Figure 11 is a southeast isometric view of a clamping jaw;

[0029] Figure 12 is a southeast isometric view of an end cap;

[0030] Figure 13 is a southeast isometric view of a closure cap;

[0031] Figure 14 is a southeast isometric view of a plunger;

[0032] Figure 15 is a southwest isometric view of a plunger.

[0033] In the figure:

[0034] 0. drill bit;

[0035] 1. laser emitter;

[0036] 2. magnetic housing,

[0037] 3. end cap,

[0038] 31. mounting hole,

[0039] 32. bolt through hole;

[0040] 4. bolt;

[0041] 5. closure cap,

[0042] 51. drill bit through hole,

[0043] 52. bolt hole;

[0044] 6. support block,

[0045] 61. first support block,

[0046] 611. first sector block,

[0047] 612. first bolt through hole,

[0048] 62. second support block,

[0049] 621. second sector block,

[0050] 622. second bolt through hole,

[0051] 623. first circular groove,

[0052] 63. third support block,

[0053] 631. third sector block,

[0054] 632. third bolt through hole,

[0055] 633. groove,

[0056] 634. inner support block,

[0057] 635. second circular groove,

[0058] 636. laser mounting seat,

[0059] 637. laser assembly hole;

[0060] 7. clamping claw,

[0061] 71. slider,

[0062] 711. arc part,

[0063] 712. mounting groove,

[0064] 713. magnetic stripe groove,

[0065] 72. magnetic stripe,

[0066] 73. plunger,

[0067] 731. cylinder,

[0068] 732. column sleeve,

[0069] 733. compression spring,

[0070] 734. ball;

[0071] 8. limit ring. DETAILED DESCRIPTION

[0072] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Although the embodiments of the present application have been shown and described, it is understood to those skilled in the art that various changes, modifications, replacements and variations of these embodiments can be made without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0073] According to the description Figures 1-3 As shown in the description

[0074] The laser emitter 1 is used to emit a cross-line laser light source to confirm the center point / line of the drilling machine;

[0075] In the present embodiment, the laser emitter 1 is a cylindrical cross-line laser light source;

[0076] The magnetic shell 2 is a hollow cylindrical structure and has magnetism;

[0077] The support block 6 is concentrically assembled in the magnetic shell 2 and is a split combined structure, including a first support block 61, a second support block 62 and a third support block 63, the lower part of the third support block 63 extends out of the magnetic shell 2, and the laser emitter 1 is assembled at the center thereof, and the center of the laser emitter 1 is collinear with the center of the support block 6;

[0078] The clamping jaw 7 is arranged in the interval cavity of the support block 6, forms repulsive magnetic force in the magnetic shell 2, applies radial clamping force to the drill bit 0, is used to contact and center-lock the drill bit 0, the clamping center of the clamping jaw 7 coincides with the center of the drill bit 0, and the center of the laser emitter 1 is collinear with the center of the drill bit 0;

[0079] The limiting ring 8 is assembled on the support block 6 and is used to limit the clamping jaw 7;

[0080] The end cover 3 is concentric with the magnetic shell 2 and is assembled at one end of the magnetic shell 2, is used to accommodate the support block 6 in the magnetic shell 2, and the laser emitter 1 assembled at the extension of the third support block 63 protrudes out of the magnetic shell 2;

[0081] The cover 5 is concentric with the magnetic shell 2 and is assembled at the other end of the magnetic shell 2, is used to accommodate the support block 6 in the magnetic shell 2, and the drill bit 0 is inserted into the center of the clamping jaw 7 to accommodate the drill bit 0 in the inner cavity of the support block 6;

[0082] The bolt 4 is used for detachably assembling the end cover 3 and the cover 5 on the magnetic shell 2;

[0083] Wherein, the drill bit 0 is inserted into the inner cavity of the support block 6 through the cover 5, and the drill bit 0 is centered and clamped by the clamping claw 7 in the support block 6; the magnetic shell 2, the laser emitter 1 and the drill bit 0 are concentric, and the center point and the center line of the drill bit 0 are indicated by the laser, so that the center point and the center line of the drill bed can be directly marked by a marker according to the laser indication, thereby avoiding the need for the drill bed to use a center drill to pre-mark the center point of the drill bed, and the drilling precision and efficiency are improved.

[0084] The technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0085] Since the support block 6 and the clamping claw 7 are concentrically connected, the centers of the two are collinear, the clamping claw 7 centers and clamps the drill bit 0 and is concentric with the magnetic shell 2, that is, the magnetic shell 2, the laser emitter 1 and the drill bit 0 are concentric, so that the drill bit 0 inserted into the inner cavity of the support block 6 through the cover 5 is collinear with the center of the laser emitter 1 assembled on the center of the third support block 63, the laser point / line emitted by the laser emitter 1 is the center point / line of the drill bit 0, and then marking the center point / line by a marker through the laser point / line is equivalent to the center point / line of the drill bed, thereby improving the work efficiency and avoiding the damage to the workpiece caused by the traditional center drill twice marking.

[0086] In order to ensure the stability of the structure of the embodiment, referring to the drawings Figures 4-10 The middle part of the support block 6 is provided with a circular hole for accommodating the drill bit 0 in the inner cavity of the support block 6;

[0087] In the embodiment, the diameter of the circular hole is slightly larger than the diameter of the drill bit 0, leaving a space for elastic clamping of the drill bit 0;

[0088] The support block 6 includes a first support block 61, a second support block 62 and a third support block 63;

[0089] The first support block 61 is concentrically assembled in the magnetic shell 2 and is formed by a circular array of first fan-shaped blocks 611, and the clamping claws 7 are assembled in the interval cavities between the first fan-shaped blocks 611; a plurality of first bolt through holes 612 are uniformly arranged on the first fan-shaped blocks 611 and penetrate through the first fan-shaped blocks 611, and the bolt 4 passes through the first support block 61 and assembles the first support block 61 in the magnetic shell 2 through the cover 5;

[0090] In the embodiment, the first fan-shaped blocks 611 are six and are uniformly arranged; the first bolt through holes 612 are two and are uniformly distributed.

[0091] The second support block 62 is located inside the first fan-shaped block 611, connected with the first fan-shaped block 611, and concentrically assembled in the magnetic shell 2, formed by a circular array of second fan-shaped blocks 621, and the clamping claws 7 are assembled in the interval cavities between the second fan-shaped blocks 621; the second support block 62 is provided with a first circular groove 623 at one end, for assembling the limiting ring 8 to limit the clamping claws 7.

[0092] In the embodiment, the second fan-shaped blocks 621 are six, uniformly arranged; and the second bolt through holes 622 are two, uniformly distributed.

[0093] The third support block 63 is concentrically connected with the second support block 62 and assembled in the magnetic shell 2; one end of the third support block 63 is assembled in the magnetic shell 2 through the end cover 3, and a circular array of third fan-shaped blocks 631 is arranged on the third support block 63; the third fan-shaped blocks 631 are uniformly arranged with third bolt through holes 632 penetrating through, for the bolt 4 to pass through the third support block 63, and the third support block 63 is assembled in the magnetic shell 2 through the end cover 3; the third fan-shaped blocks 631 are provided with grooves 633 between them for assembling the clamping claws 7; the third fan-shaped blocks 631 are radially provided with uniformly distributed inner support blocks 634, and a second circular groove 635 is formed between the third fan-shaped blocks 631 and the inner support blocks 634 for assembling the limiting ring 8; the inner support blocks 634 form blind holes for accommodating the drill bit 0 in the inner cavity of the support block 6.

[0094] In the embodiment, the diameter of the blind hole is slightly larger than the diameter of the drill bit 0, reserving space for elastic clamping of the drill bit 0.

[0095] The other end of the third support block 63 extends out of the end cover 3 and is provided with a laser mounting seat 636, and the laser mounting seat 636 is provided with a laser assembly hole 637 at the center; the laser emitter 1 is a cylindrical cross-line laser light source, and the laser emitter 1 is embedded in the laser assembly hole 637, and the center of the laser emitter 1 is collinear with the center of the clamping claw 7.

[0096] The limiting ring 8 is assembled between the first support block 61 and the second support block 62, and between the second support block 62 and the third support block 63, to limit the clamping claw 7 in the interval cavity of the support block 6.

[0097] As an optional conventional technology, the bottom of the blind hole in the third support block 63 is provided with a drill hole taper angle of 118°, forming a centering taper pit at the bottom of the blind hole, so that the drill bit 0 is centered and fixed.

[0098] The technical solutions in the above embodiments of the application have at least the following technical effects or advantages:

[0099] Because the support blocks 6 are in a circumferential array in the magnetic shell 2, the centers of the support blocks 6 coincide with the center of the magnetic shell 2.

[0100] Because the blind hole drilled in the third support block 63 has a taper angle of 118°, a centering taper pit is formed at the bottom of the blind hole, and when the drill bit 0 is inserted, the center of the drill bit 0 coincides with the center of the magnetic shell 2, achieving the collinearity of the drill bit 0 and the magnetic shell 2.

[0101] In order to further ensure the stability of the structure of the embodiment, referring to the drawings attached to the specification Figure 11 , the clamping claw 7 comprises

[0102] a sliding block 71, a magnetic strip 72 and a plunger 73;

[0103] The sliding block 71 is a sheet-shaped block, which is assembled in the interval cavity of the support block 6, and the centers of the circumferential array of the sliding blocks 71 are collinear with the center of the magnetic shell 2. The sliding block 71 contacts and radially extrudes the drill bit 0, clamps and centers the drill bit 0. A magnetic strip groove 713 is arranged at the top of the sliding block 71, which is used to assemble the magnetic strip 72. Two installation grooves 712 are arranged at the bottom of the sliding block 71, which are used to assemble the limiting ring 8. A plunger hole is arranged at one end of the sliding block 71;

[0104] The plunger 73 is assembled in the plunger hole at one end of the sliding block 71, which contacts the bottom of the blind hole in the third support block 63, and is used for the axial limiting of the clamping claw 7;

[0105] The magnetic strip 72 is assembled in the magnetic strip groove 713 of the sliding block 71. The magnetic strip 72 is adjacent to the magnetic pole of the inner wall of the magnetic shell 2, which is the same as the magnetic pole of the inner wall of the magnetic shell 2. The sliding block 71 is driven to slide in the interval cavity of the support block 6 by the repulsive force generated by the magnetic strip 72, and then elastically clamps the drill bit 0;

[0106] Among them, the height of the sliding block 71 is greater than the depth of the interval cavity, and the sliding blocks 71 are symmetrically distributed, preventing the sliding blocks 71 from blocking each other and not sliding out of the interval cavity when the drill bit 0 is not inserted.

[0107] In the embodiment, the clamping claw 7 is six, which are arranged in equal distribution.

[0108] In order to optimize the structure of the embodiment, the other end of the sliding block 71 is provided with a circular arc part 711, which is used for the smooth transition of the drill bit 0 into the inner cavity of the support block 6.

[0109] In order to further optimize the structure of the embodiment, referring to the drawings attached to the specification Figures 14-15 The plunger 73 is a press-in type elastic ball head plunger, which comprises a cylinder 731, a plunger sleeve 732, a compression spring 733 and a ball 734;

[0110] The upper part of the cylinder 731 is equipped with a cylinder sleeve 732, and a compression spring 733 is sleeved in the cylinder sleeve 732. The top end of the compression spring 733 is provided with a ball 734 for point contact with a blind hole in the third supporting block 63, so as to uniformly bear the axial force when the drill bit 0 is inserted, and facilitate the drill bit 0 to be clamped and centered by the clamping jaw 7.

[0111] In the embodiment, the end of the sliding block 71 is arranged with two plungers 73, which uniformly bear the axial force when the drill bit 0 is inserted, and facilitate the drill bit 0 to be centered by the sliding block 71.

[0112] In order to further optimize the structure of the embodiment, refer to the drawings attached to the specification Figure 12 The end cover 3 includes a mounting hole 31 and a bolt through hole 32.

[0113] The end cover 3 is a disc structure and is concentrically connected with the magnetic shell 2. The mounting hole 31 is arranged in the middle of the end cover 3, and is used for the laser mounting seat 636 of the third supporting block 63 to extend out and assemble the laser emitter 1 to emit laser. The bolt through hole 32 is arranged in the circumference of the end cover 3, and is used for connecting and fixing the end cover 3 with the magnetic shell 2 through the bolt 4.

[0114] In the embodiment, the diameter of the mounting through hole 31 is slightly larger than the diameter of the laser mounting seat 636, and the gap fit facilitates assembly. The bolt through hole 32 is twelve, and is uniformly arranged.

[0115] The technical scheme in the above embodiment of the application has at least the following technical effects or advantages:

[0116] Since the end cover 3 is arranged with the bolt through hole 32 in the circumference, the end cover 3 is concentrically connected with the magnetic shell 2, and the concentricity of the end cover 3 and the magnetic shell 2 is ensured.

[0117] In order to further optimize the structure of the embodiment, refer to the drawings attached to the specification Figure 13 The end cover 3 includes a mounting hole 31 and a bolt through hole 32.

[0118] The end cover 3 is a disc structure and is concentrically connected with the magnetic shell 2. The mounting hole 31 is arranged in the middle of the end cover 3, and is used for the laser mounting seat 636 of the third supporting block 63 to extend out and assemble the laser emitter 1 to emit laser. The bolt through hole 32 is arranged in the circumference of the end cover 3, and is used for connecting and fixing the end cover 3 with the magnetic shell 2 through the bolt 4.

[0119] In the embodiment, the diameter of the mounting through hole 31 is slightly larger than the diameter of the laser mounting seat 636, and the gap fit facilitates assembly. The bolt through hole 32 is twelve, and is uniformly arranged.

[0120] The technical scheme in the above embodiment of the application has at least the following technical effects or advantages:

[0121] Since the end cover 3 is arranged with the bolt through hole 32 in the circumference, the end cover 3 is concentrically connected with the magnetic shell 2, and the concentricity of the end cover 3 and the magnetic shell 2 is ensured.

[0122] The working principle of the embodiment is as follows:

[0123] The magnetic shell 2 has magnetism, the magnetic poles of the inner wall of the magnetic shell 2, and the magnetic strip 72 has the same magnetic poles as the magnetic poles of the inner wall of the magnetic shell 2 adjacent to the magnetic strip 72, and the repulsive force generated by the magnetic poles drives the clamping jaw 7 to slide in the interval cavity of the support block 6;

[0124] The drill bit 0 is inserted at one end of the magnetic shell 2, the clamping jaw 7 generates a magnetic clamping force acting on the drill bit 0, until the drill bit 0 is clamped and centered, at this time, the center of the drill bit 0 coincides with the center of the magnetic shell 2; at the same time, the laser emitter 1 assembled at the other end of the magnetic shell 2 is concentric with the magnetic shell 2, and then the laser point / line emitted by the laser emitter 1 is equivalent to the center point / line of the drill bit 0, so that the laser is quickly inserted and pulled out, and the laser centering is realized.

[0125] It should be noted that the contents not described in detail in the specification all belong to the prior art known to those skilled in the art, and the model parameters of the laser emitter 1 are not specifically limited, and can be determined by using conventional equipment. In the technical solution, the electric control elements not mentioned belong to the prior art, and therefore are not shown in the drawings, and will not be described here.

[0126] Finally, it should be pointed out that: the above only describes preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, 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 magnetic clamping-assisted laser centering device for a drilling machine, characterized in that: Includes a laser emitter (1), a magnetic housing (2), an end cap (3), a bolt (4), a cover (5), a support block (6), a clamping claw (7), and a limiting ring (8); The laser emitter (1) is used to emit a crosshair laser source to confirm the center point / line of the drill; The magnetic shell (2) is a hollow cylindrical structure and is magnetic; The support block (6) is concentrically assembled in the magnetic shell (2) and is a split assembly structure, including the first support block (61), the second support block (62) and the third support block (63). The lower part of the third support block (63) extends out of the magnetic shell (2) and a laser emitter (1) is assembled at its center. The laser emitter (1) is collinear with the center of the support block (6). The clamping claw (7) is assembled in the spacer cavity of the support block (6) and forms a repulsive magnetic force in the magnetic shell (2) to apply a radial clamping force to the drill bit (0) for contacting the drill bit (0) and centering and locking it. The clamping center of the clamping claw (7) coincides with the center of the drill bit (0), and the center of the laser emitter (1) is collinear with the center of the drill bit (0). The clamping claw (7) includes a slider (71), a magnetic strip (72), and a plunger (73). Among them, the height of the slider (71) is greater than the depth of the spacer cavity, and the sliders (71) are symmetrically distributed to prevent the sliders (71) from blocking each other and not sliding out of the spacer cavity when the drill bit (0) is not inserted. The limiting ring (8) is assembled on the support block (6) to limit the clamping claw (7); The end cap (3) is concentric with the magnetic shell (2) and is assembled at one end of the magnetic shell (2) to house the support block (6) in the magnetic shell (2). The laser emitter (1) assembled at the extension of the third support block (63) protrudes out of the magnetic shell (2). The cap (5) is concentric with the magnetic shell (2) and is assembled at the other end of the magnetic shell (2) to house the support block (6) in the magnetic shell (2), and the drill bit (0) is inserted into the center of the clamping claw (7) to house the drill bit (0) in the inner cavity of the support block (6); Bolts (4) are used to detachably assemble end caps (3) and sealing caps (5) onto the magnetic housing (2); The drill bit (0) passes through the cover (5) and is inserted into the inner cavity of the support block (6). The drill bit (0) is centered and clamped by the clamping claw (7) in the support block (6). The magnetic shell (2), the laser emitter (1) and the drill bit (0) are concentric. The center point and center line of the drill bit (0) are indicated by the laser. The center point and center line of the drill are marked directly by the laser indicator with a marker.

2. The magnetic clamping-assisted laser centering device for drilling machines according to claim 1, characterized in that: The support block (6) has a round hole in the middle for storing the drill bit (0) in the inner cavity of the support block (6); the support block (6) includes a first support block (61), a second support block (62) and a third support block (63). The first support block (61) is concentrically assembled inside the magnetic shell (2) and is formed by a circumferential array of first sector blocks (611). Clamping claws (7) are assembled in the spacer cavity between the first sector blocks (611). Through holes (612) are evenly arranged on the first sector blocks (611) for bolts (4) to pass through the first support block (61). The first support block (61) is assembled into the magnetic shell (2) by the cover (5). The second support block (62) is located inside the first sector block (611) and is connected to the first sector block (611). It is concentrically assembled inside the magnetic shell (2) and is formed by a circumferential array of the second sector blocks (621). Clamping claws (7) are assembled in the spacer cavity between the second sector blocks (621). Through holes (622) for bolts (4) are evenly arranged on the second sector blocks (621). A first annular groove (623) is provided at one end of the second support block (62) for mounting a limiting ring (8) to limit the clamping claws (7). The third support block (63) is concentrically connected to the second support block (62) and assembled inside the magnetic housing (2); one end of the third support block (63) is assembled inside the magnetic housing (2) through the end cap (3), and a third sector block (631) is arranged circumferentially on it. A through hole (632) for the third bolt (4) is evenly arranged on the third sector block (631) for the bolt (4) to pass through the third support block (63). The third support block (63) is assembled into the magnetic housing (2) through the end cap (3); a groove (633) is provided between the third sector blocks (631) for assembling the clamping claw (7); and an evenly distributed inner groove is provided radially on the third sector block (631). The support block (634), the third sector block (631) and the inner support block (634) form a second annular groove (635) for mounting the limiting ring (8), the inner support block (634) forms a blind hole for the drill bit (0) to be housed in the inner cavity of the support block (6); the other end of the third support block (63) extends out an end cap (3) and is provided with a laser mounting seat (636), the center of the laser mounting seat (636) is provided with a laser mounting hole (637), the laser emitter (1) is a cylindrical cross-shaped laser light source, the laser emitter (1) is embedded in the laser mounting hole (637), and the center of the laser emitter (1) is collinear with the center of the clamping claw (7); Among them, limiting rings (8) are respectively installed between the first support block (61) and the second support block (62), and between the second support block (62) and the third support block (63) to limit the clamping claw (7) in the spacer cavity of the support block (6).

3. The magnetic clamping-assisted laser centering device for drilling machines according to claim 2, characterized in that: The bottom of the blind hole in the third support block (63) is provided with a drilling cone angle of 118°, forming a centering cone pit at the bottom of the blind hole, so that the drill bit (0) is centered and fixed.

4. The magnetic clamping-assisted laser centering device for drilling machines according to claim 1, characterized in that: In the clamping claw (7); The slider (71) is a sheet-like block, assembled in the spacer cavity of the support block (6). The center of the circumferential array of sliders (71) is collinear with the center of the magnetic shell (2). The slider (71) contacts and radially presses the drill bit (0), clamping and centering the drill bit (0). A magnetic strip groove (713) is provided on the top of the slider (71) for assembling a magnetic strip (72). Two mounting grooves (712) are provided on the bottom of the slider (71) for assembling a limiting ring (8). A plunger hole is arranged at one end of the slider (71). The other end of the slider (71) is provided with an arc portion (711) for the drill bit (0) to smoothly transition into the inner cavity of the support block (6); The plunger (73) is fitted into the plunger hole at one end of the slider (71) and contacts the bottom of the blind hole in the third support block (63) for limiting the axis of the clamping claw (7); The magnetic strip (72) is assembled in the magnetic strip groove (713) of the slider (71). The magnetic poles of the magnetic strip (72) adjacent to the inner wall of the magnetic shell (2) are the same as the magnetic poles of the inner wall of the magnetic shell (2). The slider (71) is driven to slide in the spacer cavity of the support block (6) by the repulsive force, thereby elastically clamping the drill bit (0). The plunger (73) is a press-fit elastic ball plunger, including a cylinder (731), a sleeve (732), a compression spring (733), and a ball (734). A sleeve (732) is fitted on the upper part of the cylinder (731). A compression spring (733) is held inside the sleeve (732). A ball (734) is provided at the top of the compression spring (733) to make point contact with the blind hole in the third support block (63) and evenly bear the axial force when the drill bit (0) is inserted, so that the clamping claw (7) can clamp and center the drill bit (0) at multiple points.

5. The magnetic clamping-assisted laser centering device for drilling machines according to claim 2, characterized in that: The end cap (3) includes a mounting hole (31) and a bolt through hole (32); The end cap (3) is a disc-shaped structure and is concentrically connected to the magnetic shell (2). A mounting hole (31) is provided in the middle of the end cap (3) for the laser mounting base (636) of the third support block (63) to extend out and assemble the laser emitter (1) to emit laser light. There are bolt through holes (32) arranged in a circular array on the end cap (3) for connecting and fixing the end cap (3) and the magnetic shell (2) with bolts (4).

6. The magnetic clamping-assisted laser centering device for drilling machines according to claim 1, characterized in that: The cover (5) includes a drill bit through hole (51) and a bolt hole (52); The cover (5) is a disc-shaped structure. A drill bit through hole (51) is provided in the middle of the cover (5) for the drill bit (0) to pass through the cover (5) and enter the magnetic shell (2). There are bolt holes (52) arranged in a circle on the cover (5) for locking the cover (5) and the magnetic shell (2) with bolts (4).

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