Magnetic clamping auxiliary laser centering device for drilling machine

Abstract

The invention 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 invention relates to a drilling machine tool in the mechanical field, and in particular to a magnetic clamping auxiliary laser centering device for a drilling machine. Background Art

[0002] The shipbuilding industry is complex in terms of construction, diverse piping systems, and complex operating environments. The construction involves the processing and drilling of pipes, blind plates, and tooling of various calibers and materials, and the number of these is large. Before the drilling machine works, it is necessary to clamp the workpiece and adjust the opening to the center of the drilling machine.

[0003] However, the inventors of this application found that the above technology has at least the following technical problems in the process of implementing the technical solution of the invention in the embodiment of this application: It is difficult to mark the center point and center line of a drill press. It is not easy to mark the point marked by a marker pen and the center point of the drill press. If the center drill of a drill press is used to pre-drill a hole, a permanent concave point needs to be formed on the workpiece. Once the pre-drilling point of the center drill needs to be adjusted, the concave point caused by the original workpiece is a defect. If the concave points are repeatedly drilled, the new and old concave points cannot be erased, which causes confusion and easily leads to concave defects and quality problems. At the same time, the center drill of a drill press can only hit the center point and cannot mark the center line. Summary of the invention

[0004] In order to solve the deficiencies in the prior art and address the problem that the center point and center line of a drilling machine are difficult to mark, the embodiment of the present application provides a magnetic clamping assisted laser centering device for a drilling machine. The device is concentrically connected to the magnetic housing through a laser transmitter, and the drill bit is colinear with the center of the laser transmitter. The center point / line marked with a marker pen through the laser point / line is equivalent to the center point / line of the drilling machine, which improves work efficiency and avoids damage to the workpiece caused by secondary dotting of the traditional center drill, solving the technical problem that the center point and center line of the drilling machine are difficult to mark.

[0005] The solution adopted by the embodiment of the present application to solve the technical problem is: A magnetic clamping assisted laser centering device for a drilling machine comprises a laser transmitter, a magnetic housing, an end cover, a bolt, a cover, a support block, a clamping claw and a limit ring; The laser emitter is used to emit a cross-line laser light source to confirm the center point / line of the drilling machine; the magnetic shell is a hollow cylindrical structure and has magnetism; the support block is concentrically assembled in the magnetic shell, which is a split combination 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 a laser emitter is assembled at its center, and the laser emitter is colinear with the center of the support block; the clamping claw is arranged in the spacing cavity of the support block, and a repulsive magnetic force is formed in the magnetic shell to apply a radial clamping force to the drill bit, which is used to contact the drill bit and lock it in a centering manner, and the clamping claw The clamping center of the drill bit coincides with the center of the drill bit, and the center of the laser emitter is in line with the center of the drill bit; the limit ring is assembled on the support block and is used to limit the clamping claw; the end cover is concentric with the magnetic shell and assembled at one end of the magnetic shell, and is used to store 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 assembled at the other end of the magnetic shell, and is used to store the support block in the magnetic shell, and the drill bit is inserted into the center of the clamping claw to store the drill bit in the inner cavity of the support block; the bolt is used to detachably assemble the end cover and the cover on the magnetic shell; Among them, the drill bit is inserted into the inner cavity of the support block through the cover, and the drill bit is centered and clamped by the clamping claws in the support block; the magnetic shell, laser transmitter and drill bit are concentric, and the center point and center line of the drill bit are indicated by laser. The center point and center line of the drilling machine are marked directly with a marker pen according to the laser indication.

[0006] Positive effects: The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages: 1. Since the embodiment of the present application adopts a technical means in which the support block and the magnetic shell are concentrically connected as an integral structure and the centers of the two are collinear, the clamping claws center and clamp the drill bit and are concentric with the support block, that is, the magnetic shell, the laser emitter and the drill bit are concentric, and the drill bit inserted into the inner cavity of the support block by the cover is collinear with the center of the laser emitter mounted on the center of the laser mounting seat, and the laser point / line emitted by the laser emitter is the center point / line of the drill bit, which effectively solves the technical problem that the center point and center line of the drilling machine in the prior art are difficult to mark. Marking the center point / line with a marker pen through the laser point / line is equivalent to the center point / line of the drilling machine, thereby achieving the technical effect of improving work efficiency and avoiding damage to the workpiece caused by secondary dot-marking of the traditional center drill.

[0007] 2. Since the embodiment of the present application adopts the technical means of a circular array of clamping claws, it effectively solves the technical problem in the prior art that the center point and center line of the drilling machine are difficult to mark, thereby achieving the technical effect of coinciding the center of the clamping claw with the center of the magnetic shell.

[0008] 3. Since the embodiment of the present application adopts the technical means of a cone angle of 118° for blind hole drilling, a centering cone pit is formed at the bottom of the blind hole. When the drill bit is inserted, the center of the drill bit coincides with the center of the magnetic shell, which effectively solves the technical problem that the center point and center line of the drilling machine are difficult to mark in the prior art, thereby achieving the technical effect of the drill bit and the magnetic shell being colinear.

[0009] 4. Since the embodiment of the present application adopts the technical means of providing the slider with an arc portion, the clamping claw is concentrically connected with the magnetic shell, which effectively solves the technical problem that the center point and center line of the drilling machine are difficult to mark in the prior art, thereby achieving the technical effect of the clamping claw being concentric with the magnetic shell.

[0010] 5. Since the embodiment of the present application adopts the technical means of assembling a plunger in a slider, a radial force is formed by the plunger, which effectively solves the technical problem in the prior art that the center point and center line of the drilling machine are difficult to mark, and allows quick plugging and unplugging and efficient centering, thereby achieving the technical effect that the laser point / line emitted by the laser transmitter is the center point / line of the drill bit.

[0011] The invention is suitable for use as a magnetic clamping auxiliary laser centering device for a drilling machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 This is a southeast isometric half-section view of this embodiment; Figure 2 This is a southwest isometric half-section view of this embodiment; Figure 3 This is an exploded view of this embodiment; Figure 4 This is a front half-section view of this embodiment; Figure 5 It is a southeast isometric view of the first support block, the second support block, the circular ring and the clamping claw; Figure 6 It is a southwest isometric view of the first support block, the second support block, the circular ring and the clamping claw; Figure 7 is a schematic structural diagram of a first supporting block; Figure 8 is a schematic diagram of the structure of the second support block; Fig. 9 This is the southeast isometric view of the third support block; Fig.10 This is the southwest isometric view of the third support block; Fig.11 It is the southeast isometric view of the clamping jaw; Fig.12 This is the southeast isometric view of the end cap; Fig.13 To cap the southeast isometric view; Fig.14 It is the southeast isometric view of the plunger; Fig.15 Is the SW isometric view of the plunger.

[0014] In the figure: 0. Drill bit; 1. Laser transmitter; 2. Magnetic housing, 3. End caps, 31. Mounting holes, 32. Bolt through hole; 4. Bolts; 5. Capping, 51. Drill through hole, 52. Bolt holes; 6. Support block, 61. The first support block, 611. The first sector block, 612. The first bolt through hole, 62. The second support block, 621. The second sector block, 622. Second bolt through hole, 623. The first annular groove, 63. The third support block, 631. The third sector block, 632. The third bolt through hole, 633. Groove, 634.Inner support block, 635. The second annular groove, 636. Laser mount, 637. Laser assembly holes; 7. Clamping claws, 71. Slider, 711. Arc part, 712. Installation slot, 713. Magnetic strip slot, 72. Magnetic stripe, 73. Plunger, 731. Cylinder, 732. Column sleeve, 733. Compression spring, 734. Balls; 8. Limiting ring. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill 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 invention, and the scope of the present invention is defined by the attached claims and their equivalents. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention.

[0016] According to the instruction manual Figure 1-3 As shown, a magnetic clamping assisted laser centering device for a drilling machine includes a laser transmitter 1, a magnetic housing 2, an end cover 3, a bolt 4, a cover 5, a support block 6, a clamping claw 7 and a limit ring 8; The laser transmitter 1 is used to emit a cross-line laser light source to confirm the center point / line of the drilling machine; In this embodiment, the laser emitter 1 is a cylindrical cross-line laser light source; The magnetic shell 2 is a hollow cylindrical structure and has magnetic properties; The support block 6 is concentrically assembled in the magnetic housing 2, and is a split assembly 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 housing 2, and a laser emitter 1 is assembled at the center thereof. The laser emitter 1 is collinear with the center of the support block 6. The clamping claw 7 is arranged in the spacer cavity of the support block 6, and forms a repulsive magnetic force in the magnetic housing 2, and applies a radial clamping force to the drill bit 0, so as to contact the drill bit 0 and center and lock it. The clamping center of the clamping claw 7 coincides with the center of the drill bit 0, and the center of the laser transmitter 1 is collinear with the center of the drill bit 0. The limiting ring 8 is assembled on the supporting block 6 and is used to limit the clamping claw 7; The end cap 3 is concentric with the magnetic housing 2 and is assembled at one end of the magnetic housing 2, and is used to accommodate the support block 6 in the magnetic housing 2, and the laser transmitter 1 assembled at the extension of the third support block 63 protrudes out of the magnetic housing 2; The cover 5 is concentric with the magnetic housing 2 and is assembled at the other end of the magnetic housing 2 to accommodate the support block 6 in the magnetic housing 2, and the drill bit 0 is inserted into the center of the clamping claw 7 to accommodate the drill bit 0 in the inner cavity of the support block 6; The bolt 4 is used to detachably assemble the end cover 3 and the cover 5 on the magnetic housing 2; Among them, 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 claws 7 in the support block 6; the magnetic shell 2, the laser transmitter 1 and the drill bit 0 are concentric, and then the center point and the center line of the drill bit 0 are indicated by the laser. The center point and the center line of the drilling machine can be marked directly with a marker according to the laser indication, thereby eliminating the need for the drilling machine to use a center drill to pre-drill a hole to mark the center point of the drilling machine, thereby improving the accuracy and efficiency of drilling.

[0017] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Since the support block 6 and the clamping claw 7 are concentrically connected structures, the centers of the two are collinear, and the clamping claw 7 clamps the drill bit 0 in a centering manner 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. Therefore, the drill bit 0 inserted into the inner cavity of the support block 6 by the cover 5 is collinear with the center of the laser emitter 1 assembled on the center of the third support block 63, and the laser point / line emitted by the laser emitter 1 is the center point / line of the drill bit 0, and then the center point / line marked by a marker pen through the laser point / line is equivalent to the center point / line of the drilling machine, thereby improving work efficiency and avoiding damage to the workpiece caused by secondary dot marking by traditional center drilling.

[0018] In order to ensure the stability of the structure of this embodiment, see the attached Figure 4-10 A circular hole is provided in the middle of the support block 6 for receiving the drill bit 0 in the inner cavity of the support block 6; In this embodiment, the diameter of the circular hole is slightly larger than the diameter of the drill bit 0, leaving space for elastic clamping of the drill bit 0; 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 in the magnetic housing 2 and is formed by a circumferential array of first sector blocks 611. The spacer cavities between the first sector blocks 611 are equipped with clamping claws 7. The first sector blocks 611 are evenly arranged with first bolt through holes 612 for the bolts 4 to pass through the first support block 61. The first support block 61 is assembled in the magnetic housing 2 through the cover 5. In this embodiment, there are six first sector blocks 611 which are evenly arranged; there are two first bolt through holes 612 which are evenly distributed.

[0019] The second support block 62 is located inside the first sector block 611, connected to the first sector block 611, and concentrically assembled in the magnetic housing 2. It is formed by a circumferential array of second sector blocks 621. The clamping claws 7 are assembled in the spacing cavity between the second sector blocks 621. The second sector blocks 621 are evenly arranged with penetrating second bolt through holes 622 for the bolts 4 to pass through the second support block 62. A first annular groove 623 is arranged at one end of the second support block 62 for assembling a limiting ring 8 to assemble and limit the clamping claws 7. In this embodiment, there are six second sector blocks 621 which are evenly arranged; there are two second bolt through holes 622 which are evenly distributed.

[0020] The third support block 63 is concentrically connected to the second support block 62 and assembled in the magnetic housing 2; one end of the third support block 63 is assembled in the magnetic housing 2 through the end cover 3, and a third sector block 631 is arranged in a circumferential array on the third support block 631, and third bolt through holes 632 are evenly arranged on the third sector block 631, which are used for the bolt 4 to pass through the third support block 63, and the third support block 63 is assembled in the magnetic housing 2 through the end cover 3; grooves 633 are arranged between the third sector blocks 631 for assembling the clamping claws 7; the third sector block 631 is radially provided with uniformly distributed inner support blocks 634, and a second annular groove 635 is formed between the third sector block 631 and the inner support block 634 for assembling the limit ring 8, and the inner support block 634 forms a blind hole for the drill bit 0 to be received in the inner cavity of the support block 6; In this embodiment, the diameter of the blind hole is slightly larger than the diameter of the drill bit 0, leaving space for elastic clamping of the drill bit 0; 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. A laser assembly hole 637 is provided in the center of the laser mounting seat 636. The laser emitter 1 is a cylindrical cross-line laser light source. The laser emitter 1 is embedded in the laser assembly hole 211, and the center of the laser emitter 1 is collinear with the center of the clamping claw 7.

[0021] The limiting rings 8 are respectively installed between the first supporting block 61 and the second supporting block 62 , and between the second supporting block 62 and the third supporting block 63 , so as to limit the clamping claws 7 in the spacing cavity of the supporting block 6 .

[0022] As an option of conventional technology, a drilling cone angle is provided at the bottom of the blind hole in the third support block 63, and the drilling cone angle is 118°. A centering cone pit is formed at the bottom of the blind hole so that the drill bit 0 can be centered and fixed.

[0023] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Since the support blocks 6 are arranged in a circumferential array in the magnetic housing 2 , the center of the support block 6 coincides with the center of the magnetic housing 2 .

[0024] Since the cone angle of the blind hole drilled in the third support block 63 is 118°, a centering cone pit is formed at the bottom of the blind hole. When the drill bit 0 is inserted, the center of the drill bit 0 coincides with the center of the magnetic shell 2, so that the drill bit 0 and the magnetic shell 2 are collinear.

[0025] In order to further ensure the stability of the structure of this embodiment, see the attached Fig.11 , the clamping claw 7 includes Slider 71, magnetic strip 72 and plunger 73; The slider 71 is a sheet block, which is assembled in the spacer cavity of the support block 6. The center of the slider 71 of the circumferential array is collinear with the center of the magnetic housing 2. The slider 71 contacts and radially squeezes the drill bit 0, clamps the drill bit 0 and centers it. A magnetic strip groove 713 is provided on the top of the slider 71 for assembling the magnetic strip 72. Two mounting grooves 712 are provided at the bottom of the slider 71 for assembling the limit ring 8. A plunger hole is arranged at one end of the slider 71. The plunger 73 is assembled in the plunger hole at one end of the slider 71 and contacts the bottom of the blind hole in the third support block 63 to limit the axis of the clamping claw 7; The magnetic strip 72 is assembled in the magnetic strip slot 713 of the slider 71. The magnetic pole of the magnetic strip 72 adjacent to the inner wall of the magnetic housing 2 is the same as the magnetic pole of the inner wall of the magnetic housing 2. The force generated by the repulsion drives the slider 71 to slide in the cavity of the support block 6, thereby elastically clamping the drill bit 0. The height of the slider 71 is greater than the depth of the spacing cavity, and the sliders 71 are symmetrically distributed to prevent the sliders 71 from blocking each other and not sliding out of the spacing cavity when the drill bit 0 is not inserted.

[0026] In this embodiment, there are six clamping claws 7 which are evenly arranged.

[0027] In order to optimize the structure of this embodiment, a circular arc portion 711 is provided at the other end of the sliding block 71 for the drill bit 0 to smoothly transition along the circular arc portion 711 into the inner cavity of the supporting block 6 .

[0028] In order to further optimize the structure of this embodiment, see the attached Figure 14-15 The plunger 73 is a press-in elastic ball plunger, including a cylinder 731, a cylinder sleeve 732, a compression spring 733 and a ball 734; A column sleeve 732 is assembled on the upper part of the cylinder 731, and a compression spring 733 is held in the column sleeve 732. A ball 734 is provided on the top of the compression spring 733 for point contacting the blind hole in the third support block 63 to 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.

[0029] In this embodiment, two plungers 73 are arranged at the end of the slider 71 to evenly bear the axial force when the drill bit 0 is inserted, so as to facilitate the slider 71 to center the drill bit 0.

[0030] In order to further optimize the structure of this embodiment, see the attached Fig.12 , the end cover 3 includes a mounting hole 31 and a bolt through hole 32; The end cover 3 is a disc-shaped structure, which is concentrically connected to the magnetic shell 2. A mounting hole 31 is provided in the middle of the end cover 3, for the laser mounting seat 636 of the third support block 63 to extend out and assemble the laser emitter 1 to emit laser. There are bolt through holes 32 in a circumferential array on the end cover 3, which are used to connect and fix the end cover 3 to the magnetic shell 2 by bolts 4.

[0031] In this embodiment, the diameter of the mounting through hole 31 is slightly larger than the diameter of the laser mounting seat 636, and the clearance fit facilitates assembly; there are twelve bolt through holes 32, which are evenly arranged.

[0032] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Since the end cover 3 has bolt through holes 32 in a circumferential array, the end cover 3 is concentrically connected to the magnetic housing 2 to ensure that the end cover 3 is concentric with the magnetic housing 2 .

[0033] In order to further optimize the structure of this embodiment, see the attached Fig.13 , the cover 5 includes a drill through hole 51 and a bolt through hole 52; The cover 5 is a disc-shaped structure, with a drill hole 51 in the middle of the cover 5 for the drill 0 to pass through the cover 5 and enter the magnetic shell 2; a bolt hole 52 is arranged in a circumferential array on the cover 5 for locking the cover 5 and the magnetic shell 2 with bolts 4.

[0034] In this embodiment, the diameter of the drill through hole 51 is slightly larger than the diameter of the drill bit 0, leaving a margin for the drill bit 0 to penetrate; there are twelve bolt through holes 52, which are evenly arranged.

[0035] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Since the cover 5 has bolt through holes 32 arranged in a circumferential array, the cover 5 is concentrically connected to the magnetic housing 2 , ensuring that the cover 5 is concentric with the magnetic housing 2 .

[0036] The working principle of this embodiment: The magnetic shell 2 is magnetic, and the magnetic poles of the inner wall of the magnetic shell 2, the magnetic strip 72 and the adjacent magnetic poles of the inner wall of the magnetic shell 2 are the same, and the force generated by repulsion drives the clamping claw 7 to slide in the cavity between the support block 6; The drill bit 0 is inserted at one end of the magnetic shell 2, and the clamping claws 7 generate a magnetic clamping force to act on the drill bit 0 until the drill bit 0 is centered and clamped. 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 transmitter 1 installed 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 transmitter 1 is equivalent to the center point / line of the drill bit 0, so that it can be quickly plugged in and out to achieve laser centering.

[0037] It is worth noting that the contents not described in detail in the specification 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 using conventional equipment. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic clamping assisted laser centering device for a drilling machine, characterized by: It comprises a laser transmitter (1), a magnetic housing (2), an end cover (3), a bolt (4), a cover (5), a support block (6), a clamping claw (7) and a limiting ring (8); The laser transmitter (1) is used to emit a cross-line laser light source to confirm the center point / line of the drilling machine; The magnetic shell (2) is a hollow cylindrical structure and has magnetic properties; The support block (6) is concentrically mounted in the magnetic housing (2) and is a split-type combined structure, comprising a first support block (61), a second support block (62) and a third support block (63); the lower portion of the third support block (63) extends out of the magnetic housing (2), and a laser emitter (1) is mounted at the center thereof; the laser emitter (1) is colinear with the center of the support block (6); The clamping claw (7) is assembled in the spacer cavity of the support block (6) to form a repulsive magnetic force in the magnetic housing (2) to apply a radial clamping force to the drill bit (0) so as to contact the drill bit (0) and center and lock it; the clamping center of the clamping claw (7) coincides with the center of the drill bit (0), and the center of the laser transmitter (1) is colinear with the center of the drill bit (0); The limiting ring (8) is assembled on the supporting block (6) and is used to limit the position of the clamping claw (7); The end cover (3) is concentric with the magnetic housing (2) and is mounted on one end of the magnetic housing (2) and is used to accommodate the support block (6) in the magnetic housing (2); the laser emitter (1) mounted at the extension of the third support block (63) protrudes out of the magnetic housing (2); The cover (5) is concentric with the magnetic housing (2) and is assembled at the other end of the magnetic housing (2) to accommodate the support block (6) in the magnetic housing (2), and the drill bit (0) is inserted into the center of the clamping claw (7) to accommodate the drill bit (0) in the inner cavity of the support block (6); The bolts (4) are used to detachably assemble the end cover (3) and the sealing cover (5) on the magnetic housing (2); 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 claws (7) in the support block (6); the magnetic housing (2), the laser transmitter (1) and the drill bit (0) are concentric, and the center point and center line of the drill bit (0) are indicated by the laser, and the center point and center line of the drilling machine are directly marked with a marker according to the laser indication.

2. According to claim 1, a drilling machine magnetic clamping assisted laser centering device is characterized by: A circular hole is provided in the middle of the support block (6) for receiving the drill bit (0) in the inner cavity of the support block (6); the support block (6) comprises a first support block (61), a second support block (62) and a third support block (63); The first support block (61) is concentrically assembled in the magnetic housing (2) and is formed by a circumferential array of first sector blocks (611). A clamping claw (7) is assembled in the spacing cavity between the first sector blocks (611). First bolt through holes (612) are evenly arranged on the first sector blocks (611) for passing bolts (4) through the first support block (61). The first support block (61) is assembled in the magnetic housing (2) through the cover (5). The second support block (62) is located inside the first sector block (611), connected to the first sector block (611), and is concentrically assembled in the magnetic housing (2). The second support block (62) is formed by a circumferential array of second sector blocks (621), and a clamping claw (7) is assembled in the spacing cavity between the second sector blocks (621); second bolt through holes (622) are evenly arranged on the second sector block (621) for the bolts (4) to pass through the second support block (62); a first annular groove (623) is arranged at one end of the second support block (62) for assembling a limiting ring (8) to limit the assembly of the clamping claw (7); The third support block (63) is concentrically connected to the second support block (62) and is assembled in the magnetic housing (2); one end of the third support block (63) is assembled in the magnetic housing (2) through the end cover (3); a third sector block (631) is arranged in a circumferential array on the third support block (63); third bolt through holes (632) are evenly arranged on the third sector block (631) for passing the bolt (4) through the third support block (63); the third support block (63) is assembled in the magnetic housing (2) through the end cover (3); grooves (633) are arranged between the third sector blocks (631) for assembling the clamping claws (7); the third sector block (631) is radially arranged with evenly distributed An inner support block (634), a second annular groove (635) is formed between the third sector block (631) and the inner support block (634) for assembling a limit ring (8), and a blind hole is formed in the inner support block (634) for receiving the drill bit (0) in the inner cavity of the support block (6); an end cover (3) extends from the other end of the third support block (63) and is provided with a laser mounting seat (636), a laser mounting hole (637) is provided at the center of the laser mounting seat (636), the laser emitter (1) is a cylindrical cross-line laser light source, the laser emitter (1) is embedded in the laser mounting hole 211, and the center of the laser emitter (1) is collinear with the center of the clamping claw (7); Wherein, limiting rings (8) are respectively assembled between the first supporting block (61) and the second supporting block (62), and between the second supporting block (62) and the third supporting block (63), so as to limit the clamping claw (7) in the spacing cavity of the supporting block (6).

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

4. The magnetic clamping assisted laser centering device for drilling machines according to claim 1 is characterized in that: The clamping claw (7) comprises a slider (71), a magnetic strip (72) and a plunger (73); The slider (71) is a sheet-shaped block, which is assembled in the spacer cavity of the support block (6). The center of the slider (71) in the circular array is collinear with the center of the magnetic housing (2). The slider (71) contacts and radially squeezes the drill bit (0), clamps the drill bit (0) and centers it. A magnetic strip groove (713) is provided on the top of the slider (71) for assembling the magnetic strip (72). Two mounting grooves (712) are provided on the bottom of the slider (71) for assembling the limit ring (8). Plunger holes are arranged at one end of the slider (71). The plunger (73) is assembled in the plunger hole at one end of the slider (71) and contacts the bottom of the blind hole in the third support block (63) to limit the axis of the clamping claw (7); The magnetic strip (72) is assembled in the magnetic strip groove (713) of the slider (71), and the magnetic poles of the magnetic strip (72) adjacent to the inner wall of the magnetic housing (2) are the same as the magnetic poles of the inner wall of the magnetic housing (2). The repulsive force drives the slider (71) to slide in the spacing cavity of the support block (6), thereby elastically clamping the drill bit (0); The height of the sliders (71) is greater than the depth of the spacing cavity, and the sliders (71) are symmetrically distributed to prevent the sliders (71) from blocking each other and not sliding out of the spacing cavity when the drill bit (0) is not inserted.

5. The magnetic clamping assisted laser centering device for drilling machines according to claim 4 is characterized in that: The other end of the sliding block (71) is provided with an arc portion (711) for the drill bit (0) to smoothly transition along the arc portion to enter the inner cavity of the support block (6).

6. The magnetic clamping assisted laser centering device for drilling machines according to claim 4 is characterized in that: The plunger (73) is a press-in elastic ball-head plunger, comprising a cylinder (731), a cylinder sleeve (732), a compression spring (733) and a ball (734); A column sleeve (732) is mounted on the upper part of the cylinder (731), a compression spring (733) is held in the column sleeve (732), and a ball (734) is provided at the top of the compression spring (733) for point contacting the blind hole in the third support block (63) to evenly bear the axial force when the drill bit (0) is inserted, so as to facilitate the clamping claw (7) to clamp and center the drill bit (0) at multiple points.

7. The magnetic clamping assisted laser centering device for drilling machines according to claim 2 is characterized in that: The end cover (3) comprises a mounting hole (31) and a bolt through hole (32); The end cover (3) is a disc-shaped structure, and is concentrically connected to the magnetic housing (2). A mounting hole (31) is provided in the middle of the end cover (3), and is used for the laser mounting seat (636) of the third support block (63) to extend out and assemble the laser emitter (1) to emit laser light. Bolt through holes (32) are provided in a circumferential array on the end cover (3), and are used for connecting and fixing the end cover (3) to the magnetic housing (2) via bolts (4).

8. The magnetic clamping assisted laser centering device for drilling machines according to claim 1 is characterized in that: The sealing cover (5) comprises a drill through hole (51) and a bolt through hole (52); The cover (5) is a disc-shaped structure. A drill through hole (51) is provided in the middle of the cover (5) for the drill (0) to pass through the cover (5) and enter the magnetic housing (2). Bolt through holes (52) are arranged in a circumferential array on the cover (5) for locking the cover (5) and the magnetic housing (2) with bolts (4).

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