Double-edge double-groove drill

Abstract

The application discloses a double-edge double-groove drill needle and belongs to the technical field of drill needles. The drill needle comprises a drill needle main body structure, a straight cavity structure is arranged in the drill needle main body structure, and a sense perception device is arranged in the straight cavity structure. The sense perception device comprises an elastic liquid bag structure, an end tail structure is fixedly connected to the end of the elastic liquid bag structure, and the elastic liquid bag structure is elastically expanded to extend into an extension cavity. The elastic bump extending into the extension cavity is tightly attached to the inside of the extension cavity and forms an inner buckle in the extension cavity. When the double-edge double-groove drill needle is broken during the drilling process, the high pressure of the high-pressure insulating gas part in the end tail structure cavity causes the plug body to further move, the moving plug body further extrudes the insulating liquid part, the internal hydraulic pressure of the strip-shaped elastic bag body elastically deformed is further increased, and the inner buckle formed by the thin wall part elastically expanded into the extension cavity realizes the locking treatment of the broken drill.

Description

Technical Field

[0001] This invention relates to the field of drill bit technology, and more specifically, to a double-edged, double-groove drill bit. Background Technology

[0002] Drill bits, also known as PCB drill bits or micro carbide drill bits, are core consumable tools used in PCB manufacturing to drill micrometer-sized holes in circuit boards, connecting circuits on different layers through metallized vias. Drilling plays a crucial role in the entire PCB manufacturing process; the quality of the drilling directly determines the final yield of subsequent processes such as electroplating, metallization, and circuit forming. Defects in the drilling stage are almost always irreversible and can lead to the scrapping of the entire board. PCBs can be categorized into single-sided, double-sided, and multilayer boards based on their application. Multilayer boards have a large number of stacked layers, with interlayer interconnections relying entirely on a vast number of tiny metallized vias. Some high-end communication boards and server motherboards can have tens of thousands to hundreds of thousands of holes per board, placing extremely stringent demands on the overall performance, lifespan, and fault response capabilities of PCB drill bits.

[0003] Double-edged, double-groove drill bits, due to their dual-groove chip removal channel design, ensure smooth and clean chip removal during cutting, avoiding common problems in PCB board processing such as chip clogging and hole wall scratching, thus making the processing more stable. The double-edged, double-groove structure, as the name suggests, features two sets of main cutting edges and two helical chip removal grooves at the drill tip. Compared to single-groove, single-edged drill bits, the double grooves provide a larger chip removal cross-sectional area. Under high-speed rotary drilling conditions, glass fiber debris, resin powder, and copper foil chips can be quickly transported outward along the two helical grooves, significantly reducing the probability of chips remaining inside the hole. In actual industrial production practice, it can be observed that single-edged drill bits, when processing high-glass fiber content FR... When drilling 4-layer PCBs, chips easily accumulate inside the grooves. This accumulated chips continuously rub against the hole walls, causing excessive roughness and burrs at the hole openings. Furthermore, the accumulated chips act as a heat insulation layer, hindering heat dissipation during drill bit operation and further increasing the thermal load on the tool. Double-edged, double-groove drill bits, with their dual-channel chip removal advantage, greatly alleviate the series of problems caused by chip clogging. It is precisely because of this advantage that double-edged, double-groove drill bits have been widely used in mass drilling production lines for mid-to-high-end multilayer PCBs.

[0004] Unlike typical metallic materials, PCB boards exhibit significant brittleness and delamination, comprising a variety of materials with vastly different properties, including copper foil, glass fiber, and resin. This heterogeneous structure results in complex chip morphology and strong anisotropy and uncertainty in the thermal and mechanical behavior during drilling. Furthermore, the high hardness and poor thermal conductivity of PCB boards make it difficult for cutting heat to dissipate quickly during the rotary cutting process of a double-edged, double-groove drill bit. The tool experiences high temperatures and wear near the hole bottom and wall, directly reducing the cross-sectional area of ​​the drill bit that bears the cutting force. This leads to a gradual increase in cutting resistance and a severe weakening of the drill bit's bending strength and overall rigidity. During drilling, the drill bit's ability to resist axial forces and torque decreases drastically. When the load exceeds the drill bit's strength limit, drill breakage is likely. This not only requires time to clean the broken drill bit but may also cause secondary damage to the PCB board, rendering it unusable, and undoubtedly increasing tool wear costs.

[0005] In view of this, we propose a double-edged, double-groove drill bit. Summary of the Invention

[0006] Technical problem to be solved: The purpose of this invention is to provide a double-edged, double-groove drill bit, which solves the technical problem mentioned in the background art.

[0007] Technical solution: The technical solution of the present invention provides a double-edged double-groove drill bit, including a drill bit body structure, a straight cavity structure inside the drill bit body structure, and a detection sensor inside the straight cavity structure; The straight cavity structure includes multiple extensional cavities disposed on its sidewalls; The sensor includes an elastic liquid bladder structure disposed within a straight cavity structure and filled with an insulating liquid portion, and an end tail structure is fixedly connected to the end of the elastic liquid bladder structure. The end structure includes an insulating liquid section, a plug seat, and a high-pressure insulating gas section disposed within its internal cavity; The plug holder includes a plug body that is sealed and slides within the inner cavity of the end structure. The plug body is located between the insulating liquid part and the high-voltage insulating gas part. The insulating liquid part in the end structure is located on the side of the plug body near the elastic liquid bladder structure. The side of the plug body near the high-voltage insulating gas part is provided with a moving contact module. The dynamic touch module includes a static touch spring and a ring-shaped dynamic touch terminal arranged opposite to the signal transmitting unit. The ring-shaped dynamic touch terminal is connected to the dynamic touch module, while the static touch spring is connected to the inner cavity of the end structure.

[0008] As an optional solution to the technical solution of this invention, both the static touch spring and the annular dynamic touch terminal are electrically connected to the dynamic touch module. When the plug is in its initial position, under the high pressure of the high-pressure insulating gas filling the end structure cavity, the static touch spring and the annular dynamic touch terminal do not come into contact with each other.

[0009] As an optional solution to the technical solution of this invention, the main structure of the drill bit includes a drill tip, and a drill shank is connected to the drill tip.

[0010] As an optional solution of the technical solution in this invention document, the straight cavity structure includes a long groove body disposed inside the drill tip and the drill shank, and an extended cavity body is uniformly distributed on the side wall of the long groove body. The long groove body has an internal groove connected to its end, and the internal groove is located on the end of the drill shank.

[0011] As an optional solution of the technical solution in this invention document, the elastic liquid bladder structure includes a strip-shaped elastic bladder disposed inside the long groove body, and the insulating liquid part of the elastic liquid bladder structure is filled in the inner cavity of the strip-shaped elastic bladder body. A thin-walled section is provided on the sidewall of the strip-shaped elastic capsule at the location corresponding to each extended cavity.

[0012] As an optional solution of the technical solution in this invention document, the end-tail structure also includes a detachable end-tail cylinder seat that is fixedly installed in the built-in groove, and one end of the strip-shaped elastic bladder is fixedly connected to the end of the end-tail cylinder seat. A limiting inner protrusion is connected to the inner wall of the end tail cylinder seat; The end cap is sealed and connected to the opening at the end of the end of the tail cylinder seat away from the strip elastic bladder. The end cap is equipped with a one-way inflation nozzle and a one-way air inlet valve is pre-installed on the one-way inflation nozzle. The insulating liquid section and the high-voltage insulating gas section in the end-tail structure are both filled in the inner cavity of the end-tail cylinder seat.

[0013] As an optional solution to the technical solution of this invention, the signal transmitting unit includes an insulated traction rod connected to the plug body; An insulating limiting frame is connected to the end of the insulating traction rod away from the plug body; A control circuit board is connected inside the cavity of the insulating limiting frame, and a wireless transmission module is connected to the control circuit board.

[0014] As an optional solution to the technical solution of this invention, the fixed end of the static touch spring is connected to the inner wall of the cavity of the limiting inner protrusion; The annular dynamic touch terminal is connected to the side wall of the insulating traction rod, and the surface of the annular dynamic touch terminal side wall is flush with the surface of the insulating traction rod side wall.

[0015] As an optional solution to the technical solution of this invention, both the static touch spring and the ring-shaped dynamic touch terminal are electrically connected to the control circuit board in the signal transmission module.

[0016] As an optional solution to the technical solution of this invention, when the static touch spring contacts the ring-shaped dynamic touch terminal, the trigger control circuit board controls the wireless transmission module to send out control signals.

[0017] Beneficial effects: One or more technical solutions provided in this invention have at least the following technical effects or advantages: 1. High-pressure insulating gas of a preset pressure is injected into the inner cavity of the end-end structure through a one-way air inlet. The high-pressure insulating gas pushes the plug in the plug holder to move. The moving plug squeezes the insulating liquid, and the hydraulic pressure in the inner cavity of the strip-shaped elastic bladder increases. On the one hand, this makes the strip-shaped elastic bladder fit more closely to the inner wall of the long groove. On the other hand, it causes the thin-walled part of the driving strip-shaped elastic bladder to elastically expand, forming an elastic bulge that extends into the outer cavity and fits tightly against the inner part of the outer cavity. This further increases the contact area between the elastic liquid bladder structure and the drill tip, while also eliminating the air gap. Heat is directly conducted from the drill bit to the strip. The elastic bladder and thin-walled section conduct heat to the insulating liquid section, resulting in high heat transfer efficiency. This allows the double-edged, double-groove drill bit to efficiently absorb the rotary cutting heat generated during PCB drilling through the elastic liquid bladder structure that is in close contact with the inner wall of the long groove and the outer epitaxial cavity. This achieves static cooling of the rotary grinding heat generated during drilling, which helps to reduce the wear of the drill bit during drilling, reduce the risk of drill bit breakage, and extend the service life of the double-edged, double-groove drill bit, thus reducing tool wear costs.

[0018] 2. The elastic bulge formed by elastic expansion extends into the outer cavity, closely adhering to the interior of the outer cavity. Simultaneously, this elastic bulge forms an internal latch within the outer cavity. When the double-edged, double-groove drill bit breaks during drilling, the high-pressure insulating gas section within the end-tail structure causes the plug to move further. This moving plug further compresses the insulating liquid section, further increasing the internal hydraulic pressure of the elastically deformed strip-shaped bladder, thereby effectively suppressing expansion to the outer cavity. The thin-walled part forming the inner latch in the extension cavity disengages due to hydraulic pressure, and then the inner latch formed by the thin-walled part expanding into the outer extension cavity locks the broken drill bit. This not only effectively prevents secondary damage to the PCB board caused by scratches or impacts after the broken drill bit detaches from the main body of the drill tip, thus avoiding the scrapping of the board, but also effectively prevents the broken part from remaining inside the PCB board after the drill bit breaks, making it difficult to remove and directly causing the scrapping of the entire PCB board and resulting in economic losses. This improves the processing yield of PCB boards.

[0019] 3. The elastic liquid bladder structure, which is tightly attached to the inner wall of the long groove and the outer cavity, not only efficiently absorbs the rotary cutting heat generated during drilling, achieving static cooling of the rotary grinding heat generated during drilling, but also, because the strip-shaped elastic bladder itself is a complete and sealed bladder, even if the drill tip breaks and the broken part is locked, the insulating liquid will be completely sealed inside the strip-shaped elastic bladder and will not spill out and come into contact with the PCB board being processed. This helps to fundamentally ensure the cleanliness of the surface of the PCB board being processed. This not only ensures the quality of PCB board drilling, but also eliminates the need for additional cleaning processes in the event of drill breakage during PCB board drilling, thus ensuring the production efficiency of the entire PCB board production line.

[0020] 4. When a double-edged, double-groove drill bit breaks during drilling, as the high-voltage insulating gas drives the plug to move further, when the annular dynamic touch terminal, which moves synchronously with the plug, contacts the static touch spring, the control circuit board triggers the wireless transmission module to send a control signal to the external main controller. The controller then controls the drilling equipment to stop in time, thus effectively preventing the broken drill bit from continuing to move after being locked, causing batch scratches and scrapping of PCB boards. This helps to further reduce the secondary damage to PCB boards caused by broken drill bits, thereby further improving the processing yield of PCB boards.

[0021] 5. The high-pressure insulating gas filling the inner cavity of the end-tail structure not only enables the internal snapping of the drill tip, but also ensures that the signal transmission unit operates in an insulating gas environment formed by the high-pressure insulating gas, which helps to improve the reliability and stability of the signal transmission unit. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the double-edged, double-groove drill bit provided by the present invention.

[0023] Figure 2 For the present invention Figure 1 A magnified schematic diagram of a portion of the structure in section A.

[0024] Figure 3 This is a side view of the overall structure of the double-edged, double-groove drill bit provided by the present invention.

[0025] Figure 4 A cross-sectional view of the double-edged, double-groove drill bit provided by the present invention.

[0026] Figure 5 For the present invention Figure 4 A magnified schematic diagram of a local structure in section B.

[0027] Figure 6 For the present invention Figure 5 A magnified schematic diagram of a local structure in section D.

[0028] Figure 7 For the present invention Figure 5 A magnified schematic diagram of a portion of the structure in section E.

[0029] Figure 8 For the present invention Figure 4 A magnified schematic diagram of a local structure in section C.

[0030] Figure 9 This is a magnified schematic diagram of a partial structure of the strip-shaped elastic capsule in this invention.

[0031] Explanation of the labels in the diagram: 101. Drill tip; 102. Drill shank; 201. End-end cylinder seat; 202. One-way inflation nozzle; 203. Strip-shaped elastic bladder; 205. Plug; 206. Insulating liquid part; 207. Insulating traction rod; 208. Insulating limiting frame; 209. Static touch spring; 210. Ring-shaped dynamic touch terminal; 211. Limiting inner protrusion; 212. Control circuit board; 213. Wireless transmission module; 214. Thin-walled part. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Reference Figures 1 to 9 The present invention provides a double-edged double-groove drill bit, including a drill bit body structure, a straight cavity structure inside the drill bit body structure, and a detection sensor inside the straight cavity structure; The straight cavity structure includes multiple extensional cavities disposed on its sidewalls; The sensor includes an elastic liquid bladder structure disposed within a straight cavity structure and filled with an insulating liquid portion 206, and the end of the elastic liquid bladder structure is fixedly connected to a tail structure. The end structure includes an insulating liquid section 206, a plug seat, and a high-voltage insulating gas section disposed in its inner cavity. The liquid in the insulating liquid section 206 is an insulating liquid, and the gas in the high-voltage insulating gas section is an insulating gas. The plug holder includes a plug body 205 that is sealed and slides within the inner cavity of the end structure. The plug body 205 is located between the insulating liquid part 206 and the high-voltage insulating gas part. The insulating liquid part 206 in the end structure is located on the side of the plug body 205 near the elastic liquid bladder structure. A moving contact module is provided on the side of the plug body 205 near the high-voltage insulating gas part. The dynamic touch module includes a static touch spring 209 and a ring-shaped dynamic touch terminal 210 arranged opposite to the signal transmitting unit. The ring-shaped dynamic touch terminal 210 is connected to the dynamic touch module, while the static touch spring 209 is connected to the inner cavity of the end structure. Both the static touch spring 209 and the annular dynamic touch terminal 210 are electrically connected to the dynamic touch module; When the plug 205 is in the initial position, under the high pressure of the high-pressure insulating gas filling the end structure cavity, the static touch spring 209 and the annular dynamic touch terminal 210 do not contact each other.

[0035] Reference Figure 1 , Figure 3 and Figure 4 The present invention provides a double-edged double-groove drill bit, the main body structure of which includes a drill tip 101 and a drill shank 102 connected to the drill tip 101.

[0036] Reference Figure 4 and Figure 5 The present invention provides a double-edged double-groove drill bit, the straight cavity structure including a long groove body disposed inside the drill tip 101 and the drill shank 102, and an extended cavity body uniformly distributed on the side wall of the long groove body. The end of the long groove body is connected to an internal groove, and the internal groove is located on the end of the drill shank 102.

[0037] Reference Figure 4 , Figure 5 , Figure 8 and Figure 9 The present invention provides a double-edged double-groove drill bit, wherein the elastic fluid bladder structure includes a strip-shaped elastic bladder 203 disposed inside the long groove body, and the insulating liquid part 206 in the elastic fluid bladder structure is filled in the inner cavity of the strip-shaped elastic bladder 203. A thin-walled portion 214 is provided on the side wall of the strip-shaped elastic capsule 203 at the position corresponding to each extended cavity.

[0038] Reference Figure 4 and Figure 5 The present invention provides a double-edged double-groove drill bit, the end-tail structure of which also includes a detachable end-tail cylinder seat 201 fixedly installed in the built-in groove, and one end of the strip-shaped elastic bladder 203 is fixedly connected to the end of the end-tail cylinder seat 201. A limiting inner protrusion 211 is connected to the inner wall of the end tail cylinder seat 201; An end cap is sealed and connected to the opening of the end of the tail cylinder seat 201 away from the strip elastic bladder 203. The end cap is provided with a one-way inflation nozzle 202. The one-way inflation nozzle 202 is pre-installed with a one-way air inlet valve. After the high-pressure insulating gas with a preset pressure is filled into the inner cavity of the tail structure through the one-way inflation nozzle 202, the one-way air inlet valve pre-installed on the one-way inflation nozzle 202 prevents the filled gas from leaking back through the one-way inflation nozzle 202, thereby maintaining a stable air pressure in the inner cavity of the tail structure and preventing the stability of the air pressure in the inner cavity of the tail structure from being affected by air leakage. The insulating liquid part 206 and the high-voltage insulating gas part in the end-tail structure are both filled in the inner cavity of the end-tail cylinder seat 201.

[0039] High-pressure insulating gas is injected into the end-end structure cavity through the one-way air inlet 202. The high-pressure insulating gas pushes the plug 205 in the plug holder to move. The moving plug 205 squeezes the insulating liquid part 206, and the hydraulic pressure inside the strip-shaped elastic bladder 203 increases. On the one hand, this makes the strip-shaped elastic bladder 203 fit more closely to the inner wall of the long groove. On the other hand, it causes the thin-walled part 214 in the driving strip-shaped elastic bladder 203 to expand elastically, forming an elastic bulge that extends outward into the outer cavity and fits tightly against the inside of the outer cavity. This further increases the contact area between the elastic liquid bladder structure and the drill tip 101, while also eliminating air gaps and directly reducing heat. The heat transfer is conducted from the drill bit to the strip-shaped elastic bladder 203 and the thin-walled portion 214, and then to the insulating liquid portion 206. This high heat transfer efficiency allows the double-edged, double-groove drill bit to efficiently absorb the rotary cutting heat generated during PCB drilling through the elastic liquid bladder structure that is tightly attached to the inner wall of the long groove and the epitaxial cavity. This static cooling process helps reduce drill bit wear and the risk of drill breakage, extending the lifespan of the double-edged, double-groove drill bit and reducing tool wear costs. This static cooling method differs from traditional external spray or multi-channel cooling methods. Because it does not require an external cooling medium or additional piping and pumps, its structure is simpler and more integrated, making it particularly suitable for high-speed, high-precision small-diameter PCB drilling applications.

[0040] The elastic bulge formed by elastic expansion extends into the outer cavity, adhering tightly to the interior of the outer cavity. Simultaneously, the elastic bulge extending into the outer cavity forms an internal latch within the outer cavity. When the double-edged, double-groove drill bit breaks during drilling, the plug 205 moves further under the high pressure of the high-pressure insulating gas section within the end-tail structure. This causes the moving plug 205 to further compress the insulating liquid section 206, further increasing the internal hydraulic pressure of the elastically deformed strip-shaped bladder 203. This effectively prevents the thin-walled portion 214, which expands into the outer cavity and forms the internal latch, from disengaging due to a drop in hydraulic pressure. The internal latch formed by the thin-walled portion 214 then locks the broken drill bit. This internal latching structure does not rely on external mechanical or electromagnetic devices; it automatically completes the locking operation entirely through pressure changes within the high-pressure gas and hydraulic system, exhibiting high reliability and response speed. This design is not only safe and reliable, but also does not rely on external power supply or complex control logic, and can automatically activate the protection mechanism in the event of an accident. This effectively avoids secondary damage to the PCB board caused by scratches or impacts after the drill bit breaks off from the main body of the drill tip 101, thus preventing the board from being scrapped. Furthermore, it effectively prevents the broken part from remaining inside the PCB board after the drill breaks, making it difficult to remove and directly causing the entire PCB board to be scrapped, resulting in economic losses. This improves the processing yield of PCB boards.

[0041] The elastic liquid bladder structure, which is tightly attached to the inner wall of the long groove and the outer cavity, can not only efficiently absorb the rotary cutting heat generated during the drilling process and achieve static cooling of the rotary grinding heat generated during the drilling process, but also, since the strip-shaped elastic bladder 203 itself is a complete and sealed bladder, even if the drill tip 101 breaks and the broken part is locked, the insulating liquid part 206 will be completely sealed inside the strip-shaped elastic bladder 203 and will not spill out and come into contact with the PCB board being processed. This helps to fundamentally ensure the cleanliness of the surface of the PCB board being processed. This not only ensures the quality of PCB board drilling, but also eliminates the need for additional cleaning processes when a drill breaks during PCB board drilling, thus ensuring the production efficiency of the entire PCB board production line.

[0042] It should be noted that in traditional drill breakage handling, when the drill bit breaks, the machine often needs to be stopped for careful cleaning. If coolant or other media leaks onto the board surface at this time, additional cleaning and drying processes are required, which greatly affects production efficiency. However, the design of this invention completely eliminates the possibility of insulating fluid leakage. All insulating fluid is sealed inside the strip-shaped elastic bladder 203, and will not leak even in extreme drill breakage situations, thus ensuring a clean production environment.

[0043] Reference Figures 4 to 7 The present invention provides a double-edged double-groove drill bit, wherein the signal transmitting unit includes an insulating traction rod 207 connected to the plug body 205; An insulating limiting frame 208 is connected to the end of the insulating traction rod 207 away from the plug body 205. Both the insulating traction rod 207 and the insulating limiting frame 208 are made of insulating material. When the insulating limiting frame 208 moves to abut against the end of the limiting inner protrusion 211, the limiting inner protrusion 211 limits the movement of the insulating limiting frame 208. An insulating limiting frame 208 has a control circuit board 212 connected inside its cavity. A wireless transmission module 213 is connected to the control circuit board 212. The control circuit board 212 is pre-installed with a battery, which supplies power to the low-power control circuit board 212 and the wireless transmission module 213. The fixed end of the static touch spring 209 is connected to the inner wall of the limiting inner protrusion 211; The annular dynamic touch terminal 210 is connected to the side wall of the insulating traction rod 207, and the surface of the side wall of the annular dynamic touch terminal 210 is flush with the surface of the side wall of the insulating traction rod 207. The annular dynamic touch terminal 210 has an annular structure. The static touch spring 209 and the ring-shaped dynamic touch terminal 210 are both electrically connected to the control circuit board 212 in the signal transmission module; When the static touch spring 209 contacts the ring-shaped dynamic touch terminal 210, the trigger control circuit board 212 controls the wireless transmission module 213 to send out control signals.

[0044] The high-voltage insulating gas filling the inner cavity of the end-end structure not only enables the internal locking of the drill tip 101, but also ensures that the signal transmitting unit operates within an insulating gas environment created by the high-voltage insulating gas. This contributes to improving the reliability and stability of the signal transmitting unit's operation. The insulating gas effectively prevents short circuits or false triggering caused by the accumulation of tiny metal particles or conductive dust on the contacts, thus ensuring that the electrical stability of the transmitting unit remains excellent even under prolonged high-frequency drilling operations.

[0045] When a double-edged, double-groove drill bit breaks during drilling, as the high-voltage insulating gas drives the plug 205 to move further, when the annular dynamic touch terminal 210, which moves synchronously with the plug 205, contacts the static touch spring 209, the trigger control circuit board 212 controls the wireless transmission module 213 to send a control signal to the external main controller. The controller then controls the drilling equipment to stop in time, thereby effectively preventing the broken drill bit from continuing to move after being locked, causing batch scratches and scrapping of PCB boards. This helps to further reduce the secondary damage to PCB boards caused by broken drill bits, and further helps to improve the processing yield of PCB boards. The main controller mentioned in this invention is a common existing technology such as a computer that plays a control role, which will not be described in detail here.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the scope of the patent. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this invention.

Claims

1. A double-edged, double-groove drill bit, characterized in that: It includes a drill bit body structure, a straight cavity structure inside the drill bit body structure, and a detection sensor inside the straight cavity structure; The straight cavity structure includes multiple extensional cavities disposed on its sidewalls; The sensor includes an elastic liquid bladder structure disposed within a straight cavity structure and filled with an insulating liquid portion (206), and the end of the elastic liquid bladder structure is fixedly connected to a tail structure. The end structure includes an insulating liquid section (206), a plug seat, and a high-pressure insulating gas section disposed within its inner cavity; The plug holder includes a plug body (205) that is sealed and slides within the inner cavity of the end structure. The plug body (205) is located between the insulating liquid part (206) and the high-voltage insulating gas part. The insulating liquid part (206) in the end structure is located on the side of the plug body (205) near the elastic liquid bladder structure. The side of the plug body (205) near the high-voltage insulating gas part is provided with a moving contact module. The dynamic touch module includes a static touch spring (209) and a ring-shaped dynamic touch terminal (210) arranged opposite to the signal transmitting unit. The ring-shaped dynamic touch terminal (210) is connected to the dynamic touch module, while the static touch spring (209) is connected to the inner cavity of the end structure.

2. The double-edged, double-groove drill bit according to claim 1, characterized in that: The static touch spring (209) and the annular dynamic touch terminal (210) are both electrically connected to the dynamic touch module; When the plug (205) is in the initial position, under the high pressure of the high-pressure insulating gas filling the end structure cavity, the static touch spring (209) and the annular dynamic touch terminal (210) do not contact each other.

3. The double-edged, double-groove drill bit according to claim 1, characterized in that: The main structure of the drill bit includes a drill tip (101) and a drill shank (102) connected to the drill tip (101).

4. The double-edged, double-groove drill bit according to claim 3, characterized in that: The straight cavity structure includes an elongated groove disposed inside the drill tip (101) and the drill shank (102), and the extended cavity is evenly distributed on the side wall of the elongated groove. The end of the long groove body is connected to an internal groove, and the internal groove is located on the end of the drill shank (102).

5. The double-edged, double-groove drill bit according to claim 4, characterized in that: The elastic liquid bladder structure includes a strip-shaped elastic bladder (203) disposed inside the elongated groove, and the insulating liquid part (206) in the elastic liquid bladder structure is filled in the inner cavity of the strip-shaped elastic bladder (203); A thin-walled portion (214) is provided on the sidewall of the strip-shaped elastic capsule (203) at the corresponding position of each extended cavity.

6. The double-edged, double-groove drill bit according to claim 5, characterized in that: The end-tail structure also includes a detachable end-tail cylinder seat (201) fixedly installed in the built-in groove, and one end of the strip-shaped elastic bladder (203) is fixedly connected to the end of the end-tail cylinder seat (201). A limiting inner protrusion (211) is connected to the inner wall of the end tail cylinder seat (201). The end cap of the end cap (201) is sealed and connected to the opening at the end away from the strip elastic bladder (203). The end cap is provided with a one-way inflation nozzle (202), and a one-way air inlet valve is pre-installed on the one-way inflation nozzle (202). The insulating liquid part (206) and the high-voltage insulating gas part in the end-tail structure are both filled in the inner cavity of the end-tail cylinder seat (201).

7. The double-edged, double-groove drill bit according to claim 6, characterized in that: The signal transmitting unit includes an insulated traction rod (207) connected to the plug (205). An insulating limiting frame (208) is connected to the end of the insulating traction rod (207) away from the plug (205); An insulating limit frame (208) has a control circuit board (212) connected inside its cavity, and a wireless transmission module (213) is connected to the control circuit board (212).

8. The double-edged, double-groove drill bit according to claim 7, characterized in that: The fixed end of the static touch spring (209) is connected to the inner wall of the limiting inner protrusion (211); The annular dynamic touch terminal (210) is connected to the side wall of the insulating traction rod (207), and the surface of the side wall of the annular dynamic touch terminal (210) is flush with the surface of the side wall of the insulating traction rod (207).

9. The double-edged, double-groove drill bit according to claim 7, characterized in that: The static touch spring (209) and the ring dynamic touch terminal (210) are both electrically connected to the control circuit board (212) in the signal transmission module.

10. The double-edged, double-groove drill bit according to claim 9, characterized in that: When the static touch spring (209) contacts the ring dynamic touch terminal (210), the trigger control circuit board (212) controls the wireless transmission module (213) to send out control signals.

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