CN115996520B - Printed circuit board taper hole processing drill bit - Google Patents
Printed circuit board taper hole processing drill bit Download PDFInfo
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- CN115996520B CN115996520B CN202310284684.1A CN202310284684A CN115996520B CN 115996520 B CN115996520 B CN 115996520B CN 202310284684 A CN202310284684 A CN 202310284684A CN 115996520 B CN115996520 B CN 115996520B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
A conical hole processing drill bit for a printed circuit board belongs to the technical field of circuit board processing and comprises a connecting handle, wherein a round shell is arranged at the lower end of the connecting handle, a drill rod is arranged at the lower end of the round shell, drill leaves are arranged on the drill rod in a circumferential array manner, an adjusting mechanism is arranged in the round shell, and the output end of the adjusting mechanism is connected to the upper end of each drill leaf. Compared with the prior art, when the conical holes on the circuit board are machined, the conical holes with different conical degrees can be machined conveniently according to the requirements, and the demand of enterprises on drill bits is reduced in the mode, so that the production cost is reduced. The adjusting mechanism can adjust the inclination angle of the drilling blade, so that the drilling blade is in an inclination state with different degrees, and further, the conical holes with different conicities can be conveniently machined through the drilling blade. Secondly, in order to further secure the stability of the rotation of the drill, a lower drill is also provided, and the lower drill can perform positioning of the drilling position when drilling of the tapered hole is performed.
Description
Technical Field
The invention relates to the technical field of circuit board processing, in particular to a printed circuit board taper hole processing drill bit.
Background
PCB, which is called Printed Circuit Board, chinese is printed circuit board or printed circuit board, hereinafter called circuit board; the circuit board is a carrier for the electronic components. In the use process of the printed circuit board, the electronic components are often fixed on the board by screws, so that the printed circuit board is often designed with a taper hole, and the taper hole structure is shown in fig. 1. The existing taper hole processing mode adopts taper drill bit processing, and the angle of the cutting edge of the taper drill bit is consistent with the angle of the taper hole in the product, so that the taper drill bit needs to be customized according to the product requirement in the processing process. However, since the number of tapered holes in the printed circuit board is generally not large, the number of tapered drills is not required much, resulting in high customization cost per drill, and increased processing cost of the printed circuit board.
Disclosure of Invention
The invention provides a printed circuit board taper hole processing drill bit, which solves the defects in the prior art, can process taper holes with different taper angles according to requirements when processing the taper holes of the circuit board, reduces the cost investment of enterprises, and has stronger practicability.
In order to achieve the object of the present invention, the following techniques are proposed:
the utility model provides a printed circuit board bell mouth processing drill bit, includes the connective handle, and the circle shell is installed to the lower extreme of connective handle, and the drilling rod is installed to the lower extreme of circle shell, is circumference array ground on the drilling rod and is equipped with the brill leaf, is equipped with adjustment mechanism in the circle shell, and adjustment mechanism's output is connected in the upper end of every brill leaf.
The connecting handle is in a triangular prism structure.
The circular shell comprises a ring body, an upper circular plate is arranged at the upper end of the ring body, the connecting handle is arranged on the upper circular plate, a plurality of mounting protrusions are arranged at the lower end of the inner wall of the ring body, a rotating table is arranged on the inner wall of the ring body, and a lower circular plate is arranged on the mounting protrusions through screws.
The lower circular plate is provided with a plurality of pairs of guide holes in a circumferential array.
The drilling rod is including installing the installation lower wall on the plectane down, and the lower extreme of installation lower wall is equipped with the connecting rod, and the lower extreme of connecting rod is equipped with down the drill bit, and the lower bit is the toper structure, and the lower extreme of drill bit is the tip down, and the periphery of drill bit has been seted up V-arrangement groove for circumference array ground down, and the upper end of V-arrangement groove is the inclined plane, is equipped with a plurality of drill bits on the periphery of drill bit down, and the drill bit is located one of them edge of V-arrangement groove, and the drill bit is vertical setting, and the taper groove has been seted up to the upper end of drill bit down, and the lower extreme of taper groove is the tip.
T-shaped grooves are formed in the peripheral sides of the connecting rods.
The drill leaf is including sliding the T shape piece of locating in the T shape inslot, and the outer wall of T shape piece is equipped with a pair of connection arch, and the outside end of connection arch articulates there is the articulated head, and the outside end of articulated head is equipped with the arc, and one of them edge of arc is equipped with the drill plate, and the outside end protrusion of drill plate is in the outer wall of arc, and the drill plate is vertical setting, and the upper end inner wall of arc is equipped with the articulated head, and the inboard end of going up the articulated head articulates there is the concave part.
The upper section of the drilling plate is provided with a drilling blade, the lower section of the drilling plate is provided with a reaming blade, the lower end of the reaming blade is provided with an inner blade, and the inner blade is positioned in the conical groove.
The adjusting mechanism comprises a concave guide piece arranged on the inner wall of the upper circular plate, a pair of embedded guide plates are arranged at the lower end of the inner wall of the concave guide piece, a movable block is movably arranged in the concave guide piece, guide grooves are formed in two sides of the movable block, the embedded guide plates are penetrated in the guide grooves, a connecting rack is arranged on the inner side of the movable block, a gear is meshed on the connecting rack, a central shaft is concentrically arranged on the gear, the upper end of the central shaft is arranged on the upper circular plate, the lower end of the central shaft is arranged on the lower circular plate, helical teeth are arranged at the lower end of the movable block, a sliding block is matched with the lower end of the helical teeth, a concave movable piece is arranged at the lower end of the sliding block, a vertical section of the concave movable piece penetrates through the guide holes, a middle block is arranged at the lower end of the concave movable piece, and the upper end of the concave movable piece is arranged at the lower end of the middle block.
One movable block is connected with an adjusting screw in a threaded manner, two ends of the adjusting screw are provided with rotating heads, rotating seats are arranged on the rotating heads, the rotating seats are arranged on the lower circular plate, the outer side end of one rotating head is provided with a middle rod, the middle rod penetrates through the rotating table, and the outer side end of the middle rod is provided with a rotating cap.
The technical scheme has the advantages that:
compared with the prior art, when the conical holes on the circuit board are machined, the conical holes with different conical degrees can be machined conveniently according to the requirements, and the demand of enterprises on drill bits is reduced in the mode, so that the production cost is reduced. Wherein, adjustment mechanism can adjust the inclination who bores the leaf to make and bore the leaf and be different degree inclination, and then conveniently process the bell mouth of different conicities through boring the leaf, secondly when adjusting, what adopted is a plurality of boring the leaf mode of synchronous regulation, thereby stability when this drill bit rotates, avoid taking place the phenomenon of shake when rotating, thereby improved the machining precision of bell mouth, stability after this kind of adjustment mode is adjusted is higher at last, avoid causing the influence to the precision of boring when boring. Secondly, in order to further ensure the stability of the rotation of the drill bit, a lower drill bit is further arranged, and the lower drill bit can be used for positioning the drilling position when drilling the tapered hole, and the drilling of the positioning hole in the front stage of the tapered hole is convenient, so that the drilling operation of the tapered hole is convenient to implement.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 shows a perspective view of a drill bit.
Fig. 2 shows a perspective view of the drill rod.
Fig. 3 shows a perspective view of the drill bit.
Fig. 4 shows a perspective view of the upper part of the round shell.
Fig. 5 shows a perspective view of the interior of the adjusting mechanism.
Fig. 6 shows a second perspective view of the interior of the adjusting mechanism.
Reference numerals illustrate:
the drilling tool comprises a connecting handle-1, a round shell-2, a drilling rod-3, a drilling blade-4, an adjusting mechanism-5, a ring body-20, a mounting lug-21, a rotating table-22, an upper circular plate-23, a lower circular plate-24, a mounting lower disc-30, a connecting rod-31, a T-shaped groove-32, a lower drill bit-33, a V-shaped groove-34, a conical groove-35, a T-shaped block-40, a connecting lug-41, a hinging head-42, an arc-shaped plate-43, an upper hinging head-44, a concave part-45, a drilling plate-46, a reaming blade-460, a drilling blade-461, an inner blade-462, a concave guide-500, an embedded guide plate-501, a movable block-502, a guide groove-503, a connecting rack-504, a gear-505, a middle shaft-506, a sliding block-507, a concave movable part-508, a middle block-509, an adjusting screw-510, a rotating head-511, a rotating seat-512, a middle rod-513 and a rotating cap-514.
Detailed Description
As shown in fig. 1, the conical hole processing drill bit for the printed circuit board comprises a connecting handle 1, a round shell 2 is arranged at the lower end of the connecting handle 1, a drill rod 3 is arranged at the lower end of the round shell 2, drill leaves 4 are arranged on the drill rod 3 in a circumferential array manner, an adjusting mechanism 5 is arranged in the round shell 2, and the output end of the adjusting mechanism 5 is connected to the upper end of each drill leaf 4.
As shown in fig. 1, the connection handle 1 has a triangular prism structure. The design of triangular prism structure makes things convenient for drill bit and gong machine to connect the back stability stronger, when drilling, can avoid taking place the phenomenon that skids.
As shown in fig. 4 and 5, the circular shell 2 comprises a ring body 20, an upper circular plate 23 is arranged at the upper end of the ring body 20, the connecting handle 1 is installed on the upper circular plate 23, a plurality of installation protrusions 21 are arranged at the lower end of the inner wall of the ring body 20, a rotating table 22 is arranged on the inner wall of the ring body 20, and a lower circular plate 24 is installed on the installation protrusions 21 through screws. The round shell 2 is mainly arranged for protecting the adjusting mechanism 5 arranged in the round shell, and can also prevent fragments and the like generated by drilling from entering the adjusting mechanism 5, so that the adjusting operation is influenced. The lower circular plate 24 is connected by adopting a screw connection mode, so that the maintenance or assembly of the adjusting mechanism 5 arranged in the lower circular plate is convenient. Secondly, for ease of handling, the shank of the screw is screwed onto the mounting boss 21. And adopt circular shape setting to conveniently carry out the rotation of drill bit to avoid taking place the shake when rotating, thereby improve the precision of bell mouth processing.
As shown in fig. 5, a plurality of pairs of guide holes 240 are formed in the lower circular plate 24 in a circumferential array.
As shown in fig. 2, the drill rod 3 includes a mounting lower disc 30 mounted on a lower circular plate 24, a connecting rod 31 is provided at the lower end of the mounting lower disc 30, a lower drill bit 33 is provided at the lower end of the connecting rod 31, the lower drill bit 33 is in a conical structure, the lower end of the lower drill bit 33 is a small end, the periphery of the lower drill bit 33 is provided with V-shaped grooves 34 in a circumferential array, the upper end of the V-shaped grooves 34 is an inclined surface, a plurality of drill blades are provided at the periphery of the lower drill bit 33, the drill blades are located on one side of the V-shaped grooves 34, the drill blades are vertically arranged, a conical groove 35 is provided at the upper end of the lower drill bit 33, and the lower end of the conical groove 35 is a small end. The arrangement of the V-shaped groove 34 facilitates the containing of the scraps, and meanwhile, when the V-shaped groove rotates, the drilled scraps can be discharged from the upper end of the V-shaped groove 34, and the upper end of the V-shaped groove 34 is set to be an inclined plane, so that the scraps can be discharged conveniently. The vertical drill edge arranged on one edge of the V-shaped groove 34 is convenient to drill the positioning hole through the lower drill bit 33, and the stability of the rotation of the drill bit can be improved through the arrangement of the lower drill bit 33.
As shown in fig. 2, a T-shaped groove 32 is opened on the peripheral side of the connecting rod 31.
As shown in fig. 3, the drill blade 4 includes a T-shaped block 40 slidably disposed in the T-shaped groove 32, a pair of connection protrusions 41 are disposed on an outer wall of the T-shaped block 40, a hinge joint 42 is hinged to an outer side end of the connection protrusion 41, an arc plate 43 is disposed at an outer side end of the hinge joint 42, a drill plate 46 is disposed on one side of the arc plate 43, an outer side end of the drill plate 46 protrudes out of the outer wall of the arc plate 43, the drill plate 46 is vertically disposed, an upper hinge joint 44 is disposed on an inner wall of an upper end of the arc plate 43, and a concave piece 45 is hinged to an inner side end of the upper hinge joint 44. The setting of boring bar protrusion in arc 43 is when drilling, conveniently carries out the discharge of processing piece through arc 43. And the arc plate 43 is rotatably provided on the T-shaped block 40 and the concave part 45, thereby facilitating the adjustment of the inclination angle of the arc plate 43 by the movement of the concave part 45. Thereby facilitating the adjustment of the inclination angle of the drill blade 4 according to the taper of the tapered hole.
As shown in fig. 3, the upper section of the drill plate 46 is provided with a drilling blade 461, the lower section of the drill plate 46 is provided with a reaming blade 460, the lower end of the reaming blade 460 is provided with an inner blade 462, and the inner blade 462 is positioned in the tapered groove 35. Embedding the inner blade 462 in the cylindrical groove 35 can avoid damage to the drill plate 46, and secondly, when the adjustment is performed, the lower end of the drill plate 46 is exposed, so that the lower end of the drill plate 46 affects the machining precision of the tapered hole during machining. The reaming blade 460 arranged in the boring cutter can be used for reprocessing the positioning hole, further enlarging the size of the conical hole and facilitating later hole forming processing, and the taper of the reaming blade 460 is larger than that of the drilling blade 461, so that reaming operation can be rapidly realized, and the difficulty of drilling is also reduced. The boring blade 461 has a small taper so as to gently perform the processing of the tapered hole.
As shown in fig. 5 and 6, the adjusting mechanism 5 includes a concave guide 500 mounted on the inner wall of the upper circular plate 23, a pair of embedded guide plates 501 are provided at the lower end of the inner wall of the concave guide 500, a movable block 502 is movably provided in the concave guide 500, guide grooves 503 are provided at both sides of the movable block 502, the embedded guide plates 501 are all penetrated into the guide grooves 503, a connecting rack 504 is mounted at the inner side of the movable block 502, a gear 505 is engaged on the connecting rack 504, a central shaft 506 is concentrically provided on the gear 505, the upper end of the central shaft 506 is provided on the upper circular plate 23, the lower end of the central shaft 506 is provided on the lower circular plate 24, a helical tooth is provided at the lower end of the movable block 502, a sliding block 507 is matched with the lower end of the helical tooth, a helical tooth pair is provided at the upper end of the sliding block 507, for the motion transmission of the movable block 502 and the sliding block 507, a concave movable piece 508 is mounted at the lower end of the sliding block 507, a vertical section of the concave movable piece 508 is penetrated through the guide hole 240, a middle block 509 is mounted at the lower end of the concave movable piece 508, and the upper end of the concave piece 45 is mounted at the lower end of the middle block 509. The length direction of the movable block 502 is perpendicular to the length direction of the sliding block 507, or the movement direction of the movable block 502 is perpendicular to the movement direction of the sliding block 507. The guide hole 240 plays a role in guiding the movement of the concave movable member 408, and the embedded guide plate 501 plays a role in limiting and guiding the movement of the movable block 502. The transmission of the connecting rack 504 and the gear 505 facilitates the adjustment of the inclination angle of the three drill leaves 4. And the sliding block 507 can be moved when the movable block 502 moves by adopting a bevel gear matching transmission mode.
One movable block 502 is in threaded connection with an adjusting screw 510, two ends of the adjusting screw 510 are respectively provided with a rotating head 511, each rotating head 511 is provided with a rotating seat 512, each rotating seat 512 is arranged on the lower circular plate 24, the outer side end of one rotating head 511 is provided with a middle rod 513, the middle rod 513 penetrates through the rotating table 22, and the outer side end of the middle rod 513 is provided with a rotating cap 514. The mode of adjusting by the adjusting screw 510 can improve the stability of the adjusting drill 4 after the inclination angle is adjusted, and meanwhile, the adjusting operation of the drill 4 is convenient to be carried out by the rotating cap 514 and the inner hexagonal groove arranged on the outer side end of the rotating cap 514.
In the embodiment, when the taper hole is machined, the inclination angle of the drill blade 4 is adjusted according to the taper of the taper hole of the circuit board, and when the adjustment is finished, the drill bit is installed on the driving shaft of the gong machine. In the mounting, the connection handle 1 is put on the driving shaft, and then the connection handle 1 is mounted and fixed. After completion, the gong machine is started and the conical hole is machined, and during machining, the drill bit rotates under the drive of the driving shaft, and during rotation, the drill blade on the lower drill bit 33 drills the positioning hole. And when drilling, the driving shaft not only drives the drill bit to rotate, but also drives the drill bit to move downwards, and in the moving process, the lower drill bit 33 drills a positioning hole on the circuit board. Then, the driving shaft continues to drive the drill bit to move downwards, and when the drill bit moves, the reaming blade 460 with larger taper enlarges the diameter of the locating hole, so that the upper end of the locating hole is enlarged to a certain extent, then the drilling blade 461 moves into the tapered hole, and the hole is formed in the tapered hole after reaming through the drilling blade 461 until the machining is completed.
In this embodiment, when the inclination angle of the drill bit 4 is adjusted, an operator rotates the rotating cap 514 through a screwdriver or a related tool, the rotation of the rotating cap 514 drives the adjusting screw 510 to rotate, the rotation of the adjusting screw 510 drives one of the movable blocks 502 to move, the movement of the movable block 502 moves through the connecting rack 504 arranged on the adjusting screw, the movement of the connecting rack 504 drives the gear 505 to rotate, the rotation of the gear 505 drives the other two connecting racks 504 to move, so that the three movable blocks 502 synchronously move, the movement of the movable block 502 drives the movement of the movable block through the helical teeth and the helical tooth pair, the movement of the sliding block 507 drives the concave movable piece 508 to move, and the inclination angle of the drill bit 4 is increased or decreased along with the movement of the concave movable piece 508. Wherein the inclination angle of the drill bit 4 increases when the female movable member 508 moves outward, and the inclination angle of the drill bit 4 decreases when the female movable member 508 moves inward.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. The conical hole machining drill bit for the printed circuit board is characterized by comprising a connecting handle (1), wherein a round shell (2) is arranged at the lower end of the connecting handle (1), a drill rod (3) is arranged at the lower end of the round shell (2), drill leaves (4) are arranged on the drill rod (3) in a circumferential array manner, an adjusting mechanism (5) is arranged in the round shell (2), and the output end of the adjusting mechanism (5) is connected to the upper end of each drill leaf (4);
the circular shell (2) comprises a ring body (20), an upper circular plate (23) is arranged at the upper end of the ring body (20), the connecting handle (1) is arranged on the upper circular plate (23), a plurality of mounting protrusions (21) are arranged at the lower end of the inner wall of the ring body (20), a rotating table (22) is arranged on the inner wall of the ring body (20), and a lower circular plate (24) is arranged on the mounting protrusions (21) through screws;
a plurality of pairs of guide holes (240) are formed in the lower circular plate (24) in a circumferential array;
the drill rod (3) comprises a lower installation disc (30) installed on the lower circular plate (24), a connecting rod (31) is arranged at the lower end of the lower installation disc (30), a lower drill bit (33) is arranged at the lower end of the connecting rod (31), and a T-shaped groove (32) is formed in the peripheral side of the connecting rod (31);
the drilling blade (4) comprises a T-shaped block (40) which is slidably arranged in a T-shaped groove (32), a pair of connecting protrusions (41) are arranged on the outer wall of the T-shaped block (40), a hinge joint (42) is hinged to the outer side end of the connecting protrusions (41), an arc-shaped plate (43) is arranged at the outer side end of the hinge joint (42), a drilling plate (46) is arranged on one side of the arc-shaped plate (43), the outer side end of the drilling plate (46) protrudes out of the outer wall of the arc-shaped plate (43), the drilling plate (46) is vertically arranged, an upper hinge joint (44) is arranged on the inner wall of the upper end of the arc-shaped plate (43), and a concave part (45) is hinged to the inner side end of the upper hinge joint (44);
the adjusting mechanism (5) comprises a concave guide piece (500) arranged on the inner wall of the upper circular plate (23), a pair of embedded guide plates (501) are arranged at the lower end of the inner wall of the concave guide piece (500), movable blocks (507) are movably arranged at the lower ends of the concave guide piece (500), guide grooves (503) are formed in two sides of each movable block (502), connecting racks (504) are arranged on the inner sides of the movable blocks (502), gears (505) are meshed on the connecting racks (504), a central shaft (506) is concentrically arranged on the gears (505), the upper ends of the central shaft (506) are arranged on the upper circular plate (23), lower ends of the central shaft (506) are arranged on the lower circular plate (24), skewed teeth are arranged at the lower ends of the movable blocks (502), sliding blocks (507) are matched with the lower ends of the skewed teeth, concave movable blocks (508) are arranged at the lower ends of the sliding blocks (507), vertical sections of the concave movable blocks (508) penetrate through the guide holes (240), middle blocks (509) are arranged at the lower ends of the concave movable blocks (508), and the upper ends of the concave movable blocks (45) are arranged at the lower ends of the middle blocks (509).
2. The printed circuit board taper hole processing drill bit according to claim 1, characterized in that the connection shank (1) has a triangular prism-like structure.
3. The printed circuit board taper hole processing drill bit according to claim 1, characterized in that the lower drill bit (33) has a tapered structure, and the lower end of the lower drill bit (33) is a small end.
4. The printed circuit board taper hole processing drill bit according to claim 1, wherein the outer periphery of the lower drill bit (33) is provided with V-shaped grooves (34) in a circumferential array, and the upper ends of the V-shaped grooves (34) are inclined surfaces.
5. The printed circuit board taper hole processing drill according to claim 4, characterized in that the outer periphery of the lower drill (33) is provided with a plurality of drill edges, the drill edges being located on one side of the V-shaped groove (34), the drill edges being arranged vertically.
6. The printed circuit board taper hole processing drill bit according to claim 1, wherein the upper section of the drill plate (46) is provided with a drill blade (461), the lower section of the drill plate (46) is provided with a reaming blade (460), and the lower end of the reaming blade (460) is provided with an inner blade (462).
7. The printed circuit board taper hole processing drill bit according to claim 6, wherein the upper end of the lower drill bit (33) is provided with a taper groove (35), the lower end of the taper groove (35) is a small end, and the inner blade (462) is positioned in the taper groove (35).
8. The printed circuit board tapered hole machining drill of claim 7, wherein the taper of the reaming edge (460) is greater than the taper of the drilling edge (461).
9. The printed circuit board taper hole processing drill bit according to claim 1, wherein one of the movable blocks (502) is screwed with an adjusting screw (510), both ends of the adjusting screw (510) are provided with rotating heads (511), the rotating heads (511) are provided with rotating seats (512), the rotating seats (512) are mounted on the lower circular plate (24), the outer side end of one of the rotating heads (511) is provided with a middle rod (513), the middle rod (513) penetrates through the rotating table (22), and the outer side end of the middle rod (513) is provided with a rotating cap (514).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310284684.1A CN115996520B (en) | 2023-03-22 | 2023-03-22 | Printed circuit board taper hole processing drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310284684.1A CN115996520B (en) | 2023-03-22 | 2023-03-22 | Printed circuit board taper hole processing drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115996520A CN115996520A (en) | 2023-04-21 |
| CN115996520B true CN115996520B (en) | 2023-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310284684.1A Active CN115996520B (en) | 2023-03-22 | 2023-03-22 | Printed circuit board taper hole processing drill bit |
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| Country | Link |
|---|---|
| CN (1) | CN115996520B (en) |
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| CN114505700A (en) * | 2022-04-19 | 2022-05-17 | 四川英创力电子科技股份有限公司 | Positioning tool for processing depth control groove of printed circuit board |
| CN217570966U (en) * | 2022-07-04 | 2022-10-14 | 华核电气股份有限公司 | Shell large-aperture machining device |
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2023
- 2023-03-22 CN CN202310284684.1A patent/CN115996520B/en active Active
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|---|---|---|---|---|
| EP0163796A1 (en) * | 1984-04-24 | 1985-12-11 | Emile Pfalzgraf | Boring head |
| EP0234171A1 (en) * | 1986-01-16 | 1987-09-02 | Emile Pfalzgraf | Boring head |
| EP0345815A2 (en) * | 1988-06-10 | 1989-12-13 | DreBo Werkzeugfabrik GmbH | Dowel drill |
| DE9104326U1 (en) * | 1991-04-10 | 1991-06-06 | Eischeid, Karl, 5250 Engelskirchen, De | |
| DE4406168A1 (en) * | 1994-02-25 | 1995-08-31 | Erich Oswald Bernauer | Undercut drill for expansion anchor housing bore |
| AT5068U1 (en) * | 2001-03-07 | 2002-03-25 | Schraml Glastechnik Gmbh | DEVICE ON DIAMOND HOLLOW DRILLS |
| US6902014B1 (en) * | 2002-08-01 | 2005-06-07 | Rock Bit L.P. | Roller cone bi-center bit |
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| CN114222429A (en) * | 2021-11-30 | 2022-03-22 | 深圳博悦智能有限公司 | Deep drilling method for circuit board, depth setting drill bit and circuit board Finalv2 |
| CN114505700A (en) * | 2022-04-19 | 2022-05-17 | 四川英创力电子科技股份有限公司 | Positioning tool for processing depth control groove of printed circuit board |
| CN217570966U (en) * | 2022-07-04 | 2022-10-14 | 华核电气股份有限公司 | Shell large-aperture machining device |
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| CN115996520A (en) | 2023-04-21 |
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