Loading system and method for solid-phase composite lubricating medium in drilling of hard-core substrates

Abstract

This invention relates to the field of micro-hole processing technology, specifically providing a loading system and method for a solid-phase composite lubricating medium for drilling hard-core substrates. The system includes: a gas source pretreatment device, multiple sets of ultrasonic lifting devices, a flushing device, and a powder supply and dust collection device. The gas source pretreatment device delivers dry, high-pressure gas. Each set of ultrasonic lifting devices mixes different solid-phase lubricating particles with the gas to form a gas-solid mixture, which is then fed into the flushing device. Coaxially opposed gas nozzles within the flushing chamber flush the gas-solid mixture and dry, high-pressure gas to form a solid-phase composite lubricating medium. The solid-phase composite lubricating medium is delivered to the powder supply and dust collection device through a second output port on the side wall of the flushing chamber. A supply nozzle is fixed to the bottom of the device housing, with its medium input end connected to the second output port. The output end of the supply nozzle faces the drilling area of ​​the drill chuck, thus solving the problems of weak dispersion and atomization capabilities and easy deliquescence and clumping of solid-phase composite lubricating media in related technologies.

Description

Technical Field

[0001] This invention relates to the field of micro-hole processing technology, and in particular to a loading system and method for a solid-phase composite lubricating medium for drilling hard-core substrates. Background Technology

[0002] Currently, mechanical drilling has become the mainstream process for deep micro-hole forming of high-frequency hard-core substrates due to its ability to produce regular cylindrical holes, high hole wall smoothness, and controllable overall cost. During drilling, lubricating media are typically used to improve cutting conditions. Solid-phase micro-lubrication, with its advantages of no liquid phase media corroding the substrate and outstanding thermal conductivity and friction reduction effects, is gradually becoming the preferred lubrication method for deep micro-hole drilling of hard-core substrates. It plays a crucial role in ensuring processing stability, extending tool life, and improving product yield.

[0003] In related technologies, the solid lubricating media used in deep micro-hole drilling of high-frequency hard-core substrates are mostly in powder particle form, which has revealed many defects in practical applications. On the one hand, the powdered lubricating particles themselves have poor dispersion and atomization capabilities, making it difficult to form a uniform and stable aerosol during pneumatic conveying. On the other hand, solid lubricating particles are extremely susceptible to moisture absorption and agglomeration, further exacerbating problems such as conveying blockage and uneven lubrication supply. This not only fails to provide good lubrication and cooling effects but also increases drilling resistance, causing accelerated drill wear, delamination of microholes, burrs, and hole wall damage, among other quality defects. Furthermore, most existing equipment can only convey a single type of solid lubricating particle, resulting in limited lubrication performance and making it difficult to adapt to the complex drilling conditions of hard-core substrates of different materials and specifications, thus restricting the improvement of overall processing efficiency and quality.

[0004] There is currently no effective solution to the problems of weak dispersion and atomization ability and easy deliquescence and agglomeration of solid-phase composite lubricating media in related technologies. Summary of the Invention

[0005] The present invention provides a loading system and method for a solid-phase composite lubricating medium for drilling hard-core substrates, which at least solves the problems of weak dispersion and atomization ability and easy deliquescence and agglomeration of solid-phase composite lubricating media in related technologies.

[0006] According to one aspect of the present invention, a loading system for a solid-phase composite lubricating medium for drilling hard-core substrates is provided, comprising: a gas source pretreatment device, multiple sets of ultrasonic lifting devices, a counter-flushing device, and a powder supply and dust collection device; the gas source pretreatment device is connected to the counter-flushing device and the multiple sets of ultrasonic lifting devices respectively, for inputting dry high-pressure gas; each set of ultrasonic lifting devices carries solid-phase lubricating particles of different materials, the solid-phase lubricating particles are mixed with the dry high-pressure gas by ultrasonic lifting to form a gas-solid mixture and then transported to the counter-flushing device; the counter-flushing device has a counter-flushing chamber inside, the top of the counter-flushing chamber is provided with a gas nozzle, the gas nozzle is connected to the gas source pretreatment device for inputting the dry high-pressure gas; the bottom of the counter-flushing chamber is provided with a gas-solid mixture. The nozzle is connected to multiple sets of ultrasonic lifting devices. The gas nozzle has a conical concave structure, and the gas-solid nozzle has a conical structure. The gas nozzle and the gas-solid nozzle are arranged opposite each other to dilute the dry high-pressure gas and multiple gas-solid mixtures coaxially in the flushing chamber to form a solid-phase composite lubricating medium. A second output port is provided on the lower side wall of the flushing chamber at the same height as the gas-solid nozzle. The solid-phase composite lubricating medium is transported to the powder supply and dust collection device through the second output port. The powder supply and dust collection device is provided with a device housing and a supply nozzle. The supply nozzle is fixed to the bottom of the device housing. The medium input end of the supply nozzle is connected to the second output port, and the output end of the supply nozzle faces the drilling area of ​​the drill chuck.

[0007] As an optional solution, the gas nozzle is an integrated structure consisting of a first disc flange and a conical concave nozzle; the lower end of the conical concave nozzle is recessed inward to form a conical cavity; an axially penetrating gas nozzle is provided at the apex of the cavity; a second gas inlet is provided at the center of the upper surface of the first disc flange, and the second gas inlet is connected to the upper end of the gas nozzle.

[0008] As an optional solution, the gas-solid nozzle is an integrated structure consisting of a second disc flange and a conical boss. The root of the conical boss and the upper surface of the disc flange form a horizontal annular mounting platform. The conical boss has a premixing chamber inside, and an axially penetrating gas-solid nozzle is opened at the apex of the conical boss. The lower end of the gas-solid nozzle is connected to the premixing chamber. The lower end face of the second disc flange has a first gas-solid input port at its center, and the side wall of the counter-impact device has a second gas-solid input port. Both the first and second gas-solid input ports are connected to the premixing chamber, forming two independent gas-solid input channels, which are respectively connected to the gas-solid mixtures output by different ultrasonic lifting devices.

[0009] As an optional solution, the flushing device includes a hollow cylindrical shell, with the gas nozzle fixed to the top end face of the hollow cylindrical shell and the gas-solid nozzle fixed to the bottom end face of the hollow cylindrical shell; the gas nozzle, the gas-solid nozzle, and the hollow cylindrical shell together form a closed cylindrical flushing cavity; a perforated core is also provided inside the cylindrical flushing cavity, the perforated core being an annular structure with a central through hole; the perforated core is sleeved on the lower outer periphery of the conical boss, and the lower end face of the perforated core is fitted against the horizontal annular mounting platform; the outer wall of the perforated core is fitted against the inner wall of the hollow cylindrical shell, used to receive solid particles settled by gravity and regulate the flushing airflow.

[0010] As an optional solution, the ultrasonic lifting device internally comprises a solid-phase microparticle cavity, an ultrasonic transducer, and a rectifier structure; the ultrasonic transducer is disposed at the bottom of the solid-phase microparticle cavity, and the rectifier structure is disposed above the solid-phase microparticle cavity; the ultrasonic transducer is used to vibrate and lift the solid lubricating microparticles in the solid-phase microparticle cavity, and mix them with the introduced dry high-pressure gas to form a gas-solid mixture; the top of the ultrasonic lifting device is provided with a first output port, and the gas-solid mixture, after being rectified by the rectifier structure, is delivered to the counter-flushing device through the first output port;

[0011] As an optional embodiment, the ultrasonic lifting device includes a hollow cylindrical shell; the solid-phase microparticle cavity, ultrasonic transducer, and rectifier are disposed within the hollow cylindrical shell, and a dryer is fixedly installed on the side of the hollow cylindrical shell; the dryer is provided with a high-pressure air inlet, and a pressure regulating switch is provided on the high-pressure air inlet; the air outlet of the dryer is connected to the solid-phase microparticle cavity; a first gas input interface is also provided on the side wall of the hollow cylindrical shell near the ultrasonic transducer; the high-pressure gas enters the dryer through the high-pressure air inlet for drying and then enters the solid-phase microparticle cavity; a pressure gauge is also provided on the dryer, and the pressure gauge is used to monitor the inlet pressure to adjust the gas pressure inside the ultrasonic lifting device.

[0012] As an optional solution, the rectification structure includes a top cover plate of the device base and a perforated rectifier filter element; the top cover plate of the device base is fixed to the inner wall of the hollow cylindrical shell and is located directly above the ultrasonic transducer. The top cover plate of the device base has densely packed perforations, and the space between the top cover plate of the device base and the ultrasonic transducer forms a solid-phase microparticle cavity; the perforated rectifier filter element is fixed to the upper side of the top cover plate of the device base, and the perforated rectifier filter element has an elongated perforation structure. The gas-solid mixture is rectified sequentially through the densely packed perforations of the top cover plate of the device base and the perforated rectifier filter element, and then output from the first output port.

[0013] As an optional solution, the powder supply and dust collection device further includes a cantilever, a pneumatic support base, and a cylinder; the cantilever is fixed to the outside of the device housing and is fixedly connected to the pneumatic support base; the pneumatic support base is fixed to the outside of the drilling electric spindle, and the telescopic end of the cylinder is hinged to the pneumatic support base to drive the powder supply and dust collection device to synchronously feed and reset with the drill chuck.

[0014] As an optional solution, the powder supply and dust collection device further includes a diffuser core and a dust collection interface; the diffuser core is interference-fitted into the internal cavity of the device housing, and is positioned above the supply nozzle; the diffuser core is an integral annular cylindrical structure, with an axially penetrating drill chuck clearance through hole at its center; multiple guide vanes with helical angles radiate outward from the central drill chuck clearance through hole of the diffuser core, forming a helical channel between adjacent guide vanes; a ring-shaped pressure equalizing groove is formed in the middle section of the guide vanes to balance the pressure of each helical channel; the inner curvature of the helical channel is greater than the outer curvature, and the flow cross-section of the helical channel gradually increases radially outward to form an arc-shaped cavity; the inner end of the helical channel connects to the internal cavity of the device housing, and the outer end connects to the dust collection interface.

[0015] As an optional solution, the supply nozzle has a disc-shaped structure and is embedded in a circular mounting hole at the bottom of the device housing. The lower end face of the supply nozzle is flush with the lower end face of the device housing. A downwardly recessed funnel-shaped clearance groove is formed at the center of the upper end face of the supply nozzle, and an axially penetrating main nozzle is formed at the center of the bottom of the funnel-shaped clearance groove. A drill chuck passes through the central through hole of the diffuser core from above and then enters the main nozzle, with the drill bit extending from the lower end of the main nozzle. A radially extending medium input channel is formed on the side wall of the device housing, and the outer end of the medium input channel constitutes the medium input end. A radial powder inlet is formed at a corresponding position on the side wall of the supply nozzle, and the radial powder inlet is coaxially connected and sealed to the medium input channel. An annular distribution channel is provided inside the supply nozzle, and the radial powder inlet is connected to the annular distribution channel. Multiple axially penetrating auxiliary nozzles are evenly distributed circumferentially on the outer peripheral end face of the funnel-shaped clearance groove, and the upper ends of the auxiliary nozzles are all connected to the annular distribution channel.

[0016] As an optional solution, the air source pretreatment device includes a high-pressure air source, a venting silencer pipe, and an air filter; the outlet of the high-pressure air source is connected to the inlet of the air filter; a pressure relief switch is provided on the connecting pipe between the air filter and the venting silencer pipe; the air filter is connected to the ultrasonic lifting device and the counter-current device respectively through pipes, and pressure regulating switches are provided on the pipes respectively.

[0017] According to another aspect of the present invention, a method for loading a solid-phase composite lubricating medium for drilling hard-core substrates is also provided, comprising: drying and filtering high-pressure gas to output dry high-pressure gas; dividing the dry high-pressure gas into two paths, the first path being delivered to multiple sets of ultrasonic lifting devices and the second path being delivered to a counter-impact device; lifting solid-phase lubricating particles of different materials inside the multiple sets of ultrasonic lifting devices by ultrasonic vibration, mixing them with the introduced dry high-pressure gas to form a gas-solid mixture of corresponding materials, and delivering it to the counter-impact device after rectification; coaxially impacting the dry high-pressure gas and the multiple sets of gas-solid mixtures in the counter-impact chamber of the counter-impact device to form a solid-phase composite lubricating medium, and delivering it to a powder supply and dust collection device; spraying the solid-phase composite lubricating medium into the drilling area through the supply nozzle of the powder supply and dust collection device, and coordinating with the high-speed rotation of the drill chuck to carry the solid-phase composite lubricating medium into the periphery and wall of the deep microhole;

[0018] As an optional solution, the method further includes: the circumferential rotation of the drill chuck drives the surrounding airflow to rotate synchronously; after the airflow enters the spiral channel of the diffuser core, the flow cross section of the spiral channel gradually expands radially outward, forming an air pressure gradient from the inside to the outside; under the action of the air pressure gradient, the chips generated by drilling and the excess solid-phase composite lubricating medium flow outward along the spiral channel and are collected at the dust collection interface; the collected chips and excess solid-phase composite lubricating medium are extracted and recycled by the continuous negative pressure suction provided by the external negative pressure dust collection system connected to the dust collection interface.

[0019] As an optional approach, the method further includes: adjusting the air intake pressure of at least one set of ultrasonic lifting devices and counter-lifting devices in real time according to the current drilling process parameters, or adjusting the voltage of the ultrasonic lifting devices to adapt to the total input of the solid-phase composite lubricating medium; wherein the drilling process parameters include drill bit diameter, hard core substrate thickness, drilling spindle speed and feed rate.

[0020] This invention provides a loading system and method for a solid-phase composite lubricant medium used in drilling hard-core substrates. The system utilizes a gas source pretreatment device to output dry, high-pressure gas, reducing ambient humidity and minimizing the agglomeration of solid-phase lubricant particles. An ultrasonic lifting device then uses ultrasonic vibration to disperse the agglomerated particles, allowing them to fully mix with the gas to form a uniform gas-solid mixture, improving dispersion and atomization. A counter-flow device positions the gas nozzle at the top and the gas-solid nozzle at the bottom, using opposing outflows combined with gravity to ensure the downward-flowing dry, high-pressure gas and the upward-flowing gas-solid mixture fully converge, extending the particle agitation time and preventing particle settling and accumulation. The top gas nozzle employs a conical concave structure to gather the dry, high-pressure gas inwards, forming a... The downward concentrated jet, positioned in the center and with a higher flow rate, uses a conical structure at the bottom gas-solid nozzle to guide and gather the upward gas-solid mixture, drawing the diffused gas-solid flow towards the axis. This causes the two fluid streams to converge in the middle of the impact chamber, where strong collision and shearing forces break up the particle clusters, allowing the particles to be fully dispersed into single particles, ultimately forming a uniform and stable solid-phase composite lubricating medium. Simultaneously, a second output port flush with the gas-solid nozzle ensures the uniformity and stability of the output. Finally, a powder supply and dust collection device continuously transports the formed solid-phase composite lubricating medium to the processing area, thus solving the problems of weak dispersion and atomization capabilities and easy deliquescence and clumping of solid-phase composite lubricating media in related technologies, achieving the technical effect of stable pneumatic delivery of solid-phase lubricating media throughout the entire process. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other embodiments based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the loading system structure of a solid-phase composite lubricating medium for drilling hard-core substrates, according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of an ultrasonic lifting device according to an embodiment of the present invention.

[0024] Figure 3 This is an exploded view of an ultrasonic lifting device according to an embodiment of the present invention.

[0025] Figure 4 This is a side view of an ultrasonic lifting device according to an embodiment of the present invention.

[0026] Figure 5 yes Figure 4 CC cross-section view.

[0027] Figure 6 This is a schematic diagram of a hedging device according to an embodiment of the present invention.

[0028] Figure 7 This is an exploded view of the counterweight device according to an embodiment of the present invention.

[0029] Figure 8 This is a top view of the counter-flush device according to an embodiment of the present invention.

[0030] Figure 9 yes Figure 8 BB cross-section.

[0031] Figure 10 This is an exploded view of a powder supply and dust collection device according to an embodiment of the present invention.

[0032] Figure 11 This is a top view of the powder supply and dust collection device according to an embodiment of the present invention.

[0033] Figure 12 yes Figure 11 AA cross-section view.

[0034] Figure 13 This is a schematic diagram of the diffuser rectifier core according to an embodiment of the present invention.

[0035] Figure 14 This is a schematic diagram of the supply nozzle according to an embodiment of the present invention.

[0036] Figure 15 This is a partial schematic diagram of the assembly of the powder supply and dust collection device with the drill chuck.

[0037] Figure 16 This is a flowchart of a method for loading a solid-phase composite lubricating medium for drilling hard-core substrates, according to an embodiment of the present invention.

[0038] The above figures include the following reference numerals:

[0039] 1. Ultrasonic lifting device; 11. Solid-phase microparticle cavity; 12. Ultrasonic transducer; 13. Rectifying structure; 131. Top cover of the device base; 132. Small-hole rectifier filter element; 14. First output port; 15. Hollow cylindrical shell; 16. Dryer; 161. High-pressure air inlet; 162. Pressure gauge; 17. First gas input port;

[0040] 2. Counter-flush device; 21. Counter-flush chamber; 22. Gas nozzle; 221. First disc flange; 222. Conical concave nozzle; 223. Conical cavity; 224. Gas nozzle; 225. Second gas inlet; 23. Gas-solid nozzle; 231. Second disc flange; 232. Conical boss; 233. Premixing chamber; 234. First gas-solid inlet; 235. Second gas-solid inlet; 24. Second outlet; 25. Hollow cylindrical shell; 26. Squeezable core; 27. Horizontal annular mounting platform;

[0041] 3. Powder supply and dust collection device; 31. Cantilever; 32. Pneumatic support base; 33. Cylinder; 34. Diverter and rectifier core; 341. Clearance through hole; 342. Annular pressure equalization groove; 343. Spiral channel; 35. Dust collection interface; 36. Device housing; 37. Supply nozzle; 371. Funnel-shaped clearance groove; 372. Main spray hole; 373. Media input channel; 374. Media input end; 375. Radial powder inlet; 376. Auxiliary spray hole;

[0042] 41. High-pressure air source; 42. Venting and silencer pipe; 43. Air filter; 44. Pressure relief switch; 45. Pressure regulating switch. Detailed Implementation

[0043] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0044] The hard core substrate is the object to be processed and drilled in this embodiment. It refers to a high-frequency copper-clad laminate substrate material composed of metal, polymer fiber, hard filler, resin and other composites, i.e., high-frequency hard core substrate, such as ceramic-filled high-frequency copper-clad laminate. It has the characteristics of high hardness and poor thermal conductivity and is the core substrate of high-density interconnect integrated circuit (IC) carrier board.

[0045] Solid-phase composite lubricating media refer to submicron / nanoscale solid-phase lubricating particles made of two or more different materials, such as MoS2 particles, WS2 particles, PbS particles, graphite particles, etc., with a particle size of <10μm. These solid-phase lubricating particles are mixed with high-pressure dry gas to form a gas-solid two-phase mixture, used for lubrication and cooling during drilling.

[0046] Solid-phase lubricating microparticles are powdered solid lubricating materials suitable for drilling hard-core substrates. They are mainly transported pneumatically using high-pressure gas, and dispersion and atomization refer to the uniform suspension of powder in the airflow to form a gas-solid two-phase flow. Ultrasonic lifting relies on high-frequency vibration to suspend the powder, and then mixes it through opposing jets to achieve material homogenization. However, the deep micro-hole drilling of hard-core substrates is a harsh process with extremely high requirements for lubrication stability.

[0047] In related technologies, high-pressure air supply lacks drying treatment, and the presence of molecular forces between lubricating powder particles makes the lubricating powder prone to moisture absorption and agglomeration. In related technologies, the equipment relies solely on airflow for transport, which cannot break up agglomerates. The powder is unevenly dispersed and prone to settling, resulting in unstable transport and pipeline blockage. Furthermore, most of these technologies are single-path structures that can only use a single type of lubricating powder, ultimately leading to poor lubrication effect, accelerated tool wear, and reduced micro-hole processing quality and adaptability to operating conditions.

[0048] To address the problems of weak dispersion and atomization capabilities and easy deliquescence and agglomeration of solid-phase composite lubricating media in related technologies, embodiments of this invention provide a loading system for solid-phase composite lubricating media used in drilling hard-core substrates, such as... Figures 1 to 12 As shown, it includes: a gas source pretreatment device, multiple sets of ultrasonic lifting devices 1, a counter-impact device 2, and a powder supply and dust collection device 3; the gas source pretreatment device is connected to the counter-impact device 2 and multiple sets of ultrasonic lifting devices 1 respectively, and is used to input dry high-pressure gas; each set of ultrasonic lifting devices 1 carries solid lubricating particles of different materials, and the solid lubricating particles are mixed with dry high-pressure gas by ultrasonic lifting to form a gas-solid mixture and then transported to the counter-impact device 2.

[0049] The flushing device 2 has a flushing chamber 21 inside. The top of the flushing chamber 21 is equipped with a gas nozzle 22, which is connected to a gas source pretreatment device for inputting dry high-pressure gas. The bottom of the flushing chamber 21 is equipped with a gas-solid nozzle 23, which is connected to multiple sets of ultrasonic lifting devices 1. The gas nozzle 22 has a conical concave structure, and the gas-solid nozzle 23 has a conical structure. The gas nozzle 22 and the gas-solid nozzle 23 are arranged opposite to each other to coaxially flush and dilute the dry high-pressure gas with a variety of gas-solid mixtures in the flushing chamber 21 to form a solid-phase composite lubricating medium.

[0050] A second output port is provided on the lower side wall of the punching chamber 21 at a position flush with the height of the gas-solid nozzle 23. The solid phase composite lubricating medium is transported to the powder supply and dust collection device 3 through the second output port. The powder supply and dust collection device 3 is provided with a device housing 36 and a supply nozzle 37. The supply nozzle 37 is fixed to the bottom of the device housing 36. The medium input end 374 of the supply nozzle 37 is connected to the second output port. The output end of the supply nozzle 37 faces the drilling area of ​​the drill chuck.

[0051] The gas source pretreatment device includes a high-pressure gas source 41, a venting and silencer pipe 42, an air filter 43, and a pressure relief switch 44. It provides the entire system with dry, clean, and stable high-pressure gas, preventing the problem of solid lubricating particles deliquescing and agglomerating at the source. Through branch connections and independent pressure regulation, it provides suitable gas pressure conditions for the ultrasonic lifting device 1 and the counter-flushing device 2, ensuring a reliable gas source for subsequent gas-solid mixing and counter-flushing dilution.

[0052] Multiple independent ultrasonic lifting devices 1 are used to independently lift and transport solid lubricating particles of different materials such as MoS2, WS2, PbS, and graphite, providing a basis for subsequent compounding in the counter-flushing device 2. The ultrasonic lifting technology can solve the technical problem of easy agglomeration and difficulty in dispersion of submicron / nano-scale solid particles, forming a uniform and stable gas-solid mixture, ensuring that the lubricating medium can be continuously and stably transported to the counter-flushing device 2.

[0053] The gas input interface of the gas nozzle 22 is connected to the gas source pretreatment device, serving to dilute the gas-solid mixture. The pressure regulating switch 45 in the gas input pipeline of the flushing device 2 is adjusted to maintain a gas pressure of 0.1~0.8 MPa, allowing the regulated dry high-pressure gas to enter the top of the flushing device 2. The dry high-pressure gas input from the top of the flushing chamber 21 provides a power source and dilution medium for coaxial flushing dilution. By adjusting the input pressure of the pure gas, the dilution ratio can be flexibly controlled, achieving a micro-output of the solid lubricating medium, avoiding excessive waste, and meeting the micro-lubrication requirements of deep micro-hole drilling on hard-core substrates.

[0054] The gas-solid nozzle 23 is equipped with multiple gas-solid input ports, which are connected to the output ports of different ultrasonic lifting devices 1 to receive gas-solid mixtures of different materials. The gas-solid nozzle 23 realizes the centralized input of multiple gas-solid mixtures, providing an input channel for the composite mixing of various lubricating media in the anti-collision cavity 21, ensuring that lubricating particles of different materials can fully contact and mix in the anti-collision cavity 21.

[0055] The conical concave structure of the gas nozzle 22 is equivalent to a tapered funnel-shaped converging structure, which allows high-pressure gas to converge towards the center along the conical wall, forming a concentrated, high-speed, and vertically downward stable jet at the nozzle, thus avoiding energy dispersion caused by the airflow of the planar nozzle spreading to the surroundings.

[0056] The conical structure of the gas-solid nozzle 23 is equivalent to a gradually expanding guide cone structure, which allows the gas-solid mixture to be smoothly guided to the center along the conical surface, forming a uniform, vertically upward, stable jet, avoiding local eddies and particle deposition caused by right-angle structures. The coaxial arrangement of the conical structure and the concave conical structure ensures that the collision energy of the upper and lower jets is maximized, efficiently breaking up agglomerated solid lubricating particles and forming a uniform and stable solid-phase composite lubricating medium. At the same time, the smooth conical surface has no sharp edges or dead corners, avoiding particle deposition and blockage, thus ensuring the long-term stability of the system.

[0057] like Figure 9 As shown, gas nozzle 22 and gas-solid nozzle 23 are coaxially opposite each other. The preferred implementation parameter for the coaxially opposite distance is determined by the supply pressure, and the distance ranges from 1mm to 50mm. The pressure-regulated pure gas flows into the gas input pipeline of the counter-current device 2, where it counter-currents with the gas-solid mixture from the ultrasonic lifting device 1, further diluting the mixture and achieving a micro-premixing effect. Through the coaxial counter-current method, utilizing the strong turbulence effect generated by the frontal collision of the airflow, efficient and uniform mixing of pure high-pressure gas and various gas-solid mixtures is achieved, completing the secondary dilution.

[0058] The second output port is positioned at the same height as the gas-solid nozzle 23 on the lower side wall of the flushing chamber 21. This is to utilize the kinetic energy of the airflow reversal after flushing to reduce flow resistance, while simultaneously using gravity settling to allow any large particles to settle at the bottom of the flushing chamber 21, preventing them from entering the second output port and causing blockage. This ensures the smooth output of the solid-phase composite lubricating medium after flushing and mixing, guarantees the uniformity of the output medium, effectively intercepts large particles settling due to gravity, and ensures the unobstructed flow of downstream pipelines and the stability of the powder supply and dust collection device 3.

[0059] By supplying nozzle 37, a solid-phase composite lubricating medium is sprayed into the drilling area of ​​the drill chuck, so that the composite lubricating medium acts on the interface between the drill cutting edge and the hole wall, giving full play to the synergistic friction reduction and heat absorption and cooling effect of different lubricating particles, effectively reducing the drilling force of deep micro-holes in hard core substrates, reducing drill wear, mitigating interlayer delamination and hole wall damage, and improving the processing quality of deep micro-holes.

[0060] like Figure 1 As shown, the loading system for the solid-phase composite lubricating medium used in drilling hard-core substrates in this embodiment uses a high-pressure gas source 41 as the power source. The high-pressure gas is first passed through an air filter to filter impurities and then distributed to the ultrasonic lifting devices through multiple pressure-regulated channels. A pressure relief switch and a venting and silencing pipe 42 are also provided to reduce equipment pressure and noise. The two gas streams are respectively dried by independent pressure-regulating switches, dryers, and pressure gauges before being sent to two sets of ultrasonic lifting devices 1, which ultrasonically disperse and lift the solid-phase lubricating particles A and B, respectively, completing the first-stage premixing to form two gas-solid mixtures.

[0061] Two gas-solid mixtures are delivered to the counter-flushing device 2. Simultaneously, dry high-pressure gas, regulated by a pressure regulator, is introduced into the top of the counter-flushing device 2, forming an opposing counter-flushing with the two sets of gas-solid mixtures input from the bottom. As an optional solution, the counter-flushing device can also be equipped with a dryer and a pressure gauge to regulate the gas conditions in real time. After the dry high-pressure gas and various gas-solid mixtures are coaxially counter-flushed and diluted in the counter-flushing chamber 21 to form a solid-phase composite lubricating medium, it is delivered outward to the powder supply and dust collection device. Pressure regulators 45 are installed in each pipeline throughout the process to achieve independent control of the airflow pressure in each branch.

[0062] This invention provides a loading system for a solid-phase composite lubricating medium used in drilling hard-core substrates. The system utilizes a pre-treatment device to output dry, high-pressure gas, reducing ambient humidity and minimizing the agglomeration of solid-phase lubricating particles. An ultrasonic lifting device 1 then uses ultrasonic vibration to disperse the agglomerated particles, allowing them to mix thoroughly with the gas to form a uniform gas-solid mixture, thus improving dispersion and atomization. A counter-flushing device 2 uses two sets of coaxial nozzles to further mix and homogenize the material, ensuring stable medium delivery. Finally, a powder supply and dust collection device 3 continuously delivers the formed solid-phase composite lubricating medium to the processing area. This system solves the problems of weak dispersion and atomization capabilities and easy deliquescence and agglomeration in related technologies, achieving a stable pneumatic delivery of the solid-phase lubricating medium throughout the entire process.

[0063] As an alternative solution, such as Figure 7 , Figure 8 , Figure 9 As shown, the gas nozzle 22 is an integral structure composed of a first disc flange 221 and a conical concave nozzle 222; the lower end of the conical concave nozzle 222 is recessed inward to form a conical cavity 223; an axially penetrating gas nozzle 224 is provided at the apex of the cavity; a second gas inlet 225 is provided at the center of the upper surface of the first disc flange 221, and the second gas inlet 225 is connected to the upper end of the gas nozzle 224.

[0064] When the gas nozzle 22 is working, it is subjected to high-pressure gas impact of 0.1~0.8MPa. The integrated structure composed of the first disc flange 221 and the conical concave nozzle 222 can eliminate assembly gaps and ensure airtightness. At the same time, the integrated structure can ensure the coaxiality of the first disc flange 221 and the conical concave nozzle 222, ensuring alignment with the gas-solid nozzle 23 below.

[0065] The lower end of the concave cone nozzle 222 is recessed to form a concave cavity 223, which is a funnel-shaped nozzle with an angle range of 60° to 135°. The concave cone structure can guide the ejected high-pressure gas to converge along the wall of the concave cavity 223, forming a concentrated high-speed jet. This enhances the impact and collision intensity with the gas-solid mixture below, thereby promoting further dispersion and uniform mixing of the gas-solid mixture and improving the effect of secondary dilution.

[0066] The diameter of the gas nozzle 224 is between 0.1 mm and 0.5 mm, and it is an axially penetrating circular hole. The gas nozzle 224 is located at the apex of the conical cavity 223, which allows the high-pressure gas after convergence to be injected vertically downward along the central axis of the counter-flow cavity 21, ensuring that it directly impacts the gas-solid mixture ejected from the gas-solid nozzle 23 below; thereby maximizing the energy of the impact and making the mixing more complete.

[0067] The second gas inlet 225 is located at the center of the upper surface of the first disc flange 221 and is connected to the pipeline of the gas source pretreatment device. The second gas inlet 225 is connected to the upper end of the gas nozzle 224. The center air inlet design allows the airflow to enter the nozzle axially, ensuring stable airflow pressure and uniform airflow velocity, and ensuring the accuracy of the injection direction.

[0068] The integrated structure of the gas nozzle 22 in this embodiment solves the problem of high-pressure gas leakage and ensures the stability of the counter-impact pressure. The conical concave cavity significantly enhances the jet energy and improves the turbulence intensity of the counter-impact collision. The design of the apex nozzle and the center straight-through air inlet ensures the alignment of the injection direction and the lag-free transmission of air pressure. This achieves efficient and sufficient coaxial counter-impact with the gas-solid mixture below, providing a reliable structural guarantee for the stable micro-output of the solid-phase composite lubricating medium.

[0069] As an alternative solution, such as Figure 7 , Figure 8 , Figure 9 As shown, the gas-solid nozzle 23 is an integral structure composed of a second disc flange 231 and a conical boss 232. A horizontal annular mounting platform 27 is formed between the root of the conical boss 232 and the upper surface of the disc flange. The conical boss 232 has a premixing chamber 233 inside. An axially penetrating gas-solid nozzle is opened at the apex of the conical boss 232. The lower end of the gas-solid nozzle is connected to the premixing chamber 233. A first gas-solid inlet 234 is provided at the center of the lower end face of the second disc flange 231. A second gas-solid inlet 235 is provided on the side wall of the flushing device 2. Both are connected to the premixing chamber 233, forming two independent gas-solid input channels, which are respectively connected to the gas-solid mixture output by different ultrasonic lifting devices 1.

[0070] When the gas-solid nozzle 23 is working, it is subjected to the impact of multiple gas-solid mixtures of 0.1~0.8MPa. The integrated structure composed of the second disc flange 231 and the conical boss 232 can eliminate the assembly gap, ensure airtightness, and avoid concentration deviation caused by leakage of gas-solid mixture. At the same time, the integrated structure can ensure the coaxiality of the second disc flange 231 and the conical boss 232, ensuring coaxial alignment with the gas nozzle 22 above, and achieving frontal impact.

[0071] The horizontal annular mounting platform 27 formed between the root of the conical boss 232 and the upper surface of the second disc flange 231 is used to support the installation of the sprue core 26, providing a stable horizontal support surface for the sprue core 26, ensuring that the sprue core 26 fits tightly against the inner wall of the counter-flush cavity 21 after installation, and at the same time ensuring the levelness of the sprue core 26 to avoid airflow deviation caused by tilting.

[0072] The conical boss 232 is provided with a premixing chamber 233, which provides a space for premixing of two gas-solid mixtures of different materials. This allows different lubricating particles such as MoS2, WS2, and graphite from different ultrasonic lifting devices 1 to be initially mixed before entering the counter-flushing chamber 21, reducing the load on subsequent counter-flushing mixing and improving the uniformity of the final composite lubricating medium.

[0073] The diameter of the gas-solid nozzle is between 0.1 mm and 1.0 mm, and it is an axially penetrating circular hole. The gas-solid nozzle is located at the apex of the conical boss 232, which allows the premixed gas-solid mixture to be injected vertically upward along the central axis of the impact chamber 21, ensuring a head-on impact with the pure high-pressure gas ejected from the gas nozzle 22 above.

[0074] The first gas-solid inlet 234 is located at the center of the lower end face of the second disc flange 231 and is connected to the output pipe of the first set of ultrasonic lifting devices 1; the second gas-solid inlet 235 is located on the side wall of the counter-impact device 2 and is connected to the output pipe of the second set of ultrasonic lifting devices 1; the two interfaces are located in different positions and can be controlled independently.

[0075] The first gas-solid input port 234 and the second gas-solid input port 235 are both connected to the premixing chamber 233, forming two independent gas-solid input channels, which are respectively connected to different gas-solid mixtures of different materials output by different ultrasonic lifting devices 1. By adjusting the air pressure and voltage of the two ultrasonic lifting devices 1 respectively, the input amount of each lubricating particle can be adjusted independently, so as to realize the adjustable component ratio of the solid phase composite lubricating medium.

[0076] In this embodiment, the integrated structure of the gas-solid nozzle 23 solves the leakage problem of the high-pressure gas-solid mixture, ensuring the stability of the gas-solid injection pressure and the coaxial alignment accuracy; the horizontal annular mounting platform 27 provides a reliable mounting reference for the leak-shaped core 26; the internal premixing chamber 233 realizes the initial uniform mixing of two gas-solid mixtures of different materials; the two independent input channels realize the independent control of the proportion of different lubricating particle components.

[0077] As an alternative solution, such as Figures 6 to 9As shown, the flushing device 2 includes a hollow cylindrical shell 25, a gas nozzle 22 fixed to the top end face of the hollow cylindrical shell 25, and a gas-solid nozzle 23 fixed to the bottom end face of the hollow cylindrical shell 25. The gas nozzle 22, the gas-solid nozzle 23, and the hollow cylindrical shell 25 together form a closed cylindrical flushing cavity 21. A perforated core 26 is also provided inside the cylindrical flushing cavity 21. The perforated core 26 is an annular structure with a through hole in the center. The perforated core 26 is sleeved on the lower outer periphery of the conical boss 232, and the lower end face of the perforated core 26 is attached to the horizontal annular mounting platform 27. The outer wall of the perforated core 26 is attached to the inner wall of the hollow cylindrical shell 25 to receive solid particles settled by gravity and regulate the flushing airflow.

[0078] The counter-flushing device 2 uses a hollow cylindrical shell 25 as the main load-bearing structure. The gas nozzle 22 is fixedly installed on the top end face of the hollow cylindrical shell 25 through the first disc flange 221, and the gas-solid nozzle 23 is fixedly installed on the bottom end face of the hollow cylindrical shell 25 through the second disc flange 231. The cylindrical shell structure is evenly stressed and can withstand an internal working pressure of 0.1~0.8MPa. The end flange connection method facilitates disassembly, maintenance and sealing.

[0079] The first disc flange 221 and the second disc flange 231 are both circular flat flange structures. Multiple bolt mounting holes are evenly distributed around the circumference of the disc, which are used to seal and fix the gas nozzle 22 and the gas-solid nozzle 23 as a whole to the top and bottom end faces of the hollow cylindrical shell 25 in the counter-impact device by bolts.

[0080] Gas nozzle 22 and gas-solid nozzle 23 are respectively sealed and installed at the upper and lower ends of the hollow cylindrical shell 25, and the three together form a completely closed cylindrical opposing cavity 21. The inner wall of the closed cylindrical cavity is smooth and without dead corners, which can prevent the gas-solid mixture from stagnating and depositing in the cavity. The cylindrical flow field is symmetrical and uniform, which is conducive to the coaxial opposing mixing of the upper and lower airflows.

[0081] A perforated core 26 is provided at the lower part of the cylindrical punching cavity 21. The perforated core 26 is an overall annular structure with a through hole in the center that matches the outer diameter of the conical boss 232, allowing the conical boss 232 to pass through.

[0082] The sprue core 26 is fitted onto the lower outer periphery of the tapered boss 232 through the central through hole, and the lower end face of the sprue core 26 is fitted and supported on the horizontal annular mounting platform 27 of the gas-solid nozzle 23. The fitted installation method facilitates disassembly and cleaning, and the horizontal annular mounting platform 27 provides a stable support benchmark to ensure that the sprue core 26 remains horizontal after installation and will not tilt or shift.

[0083] The outer wall of the funnel core 26 fits perfectly against the inner wall of the hollow cylindrical shell 25 without any gaps. During the flushing process, larger solid lubricating particles that fail to disperse sufficiently will settle along the inner wall of the flushing cavity 21 under gravity and be intercepted by the funnel core 26, preventing the settled particles from accumulating in the dead corner at the bottom of the cavity and becoming damp and agglomerated over a long period. Large particles entering the downstream output pipeline can cause blockages. At the same time, the upper surface of the funnel core 26 can regulate and guide the airflow that diffuses in all directions after the collision, eliminating turbulent eddies generated by the flushing and allowing the airflow to flow smoothly towards the second output port 24.

[0084] In this embodiment, the hollow cylindrical shell 25 provides a closed anti-collision space with strong pressure bearing capacity and symmetrical and uniform flow field; the leaky core 26, through the fitted installation method, effectively intercepts large solid particles that settle due to gravity, and at the same time plays a role in regulating and straightening the turbulent airflow after collision, so that the uniformly mixed solid composite lubricating medium can flow smoothly to the output port.

[0085] As an alternative solution, such as Figures 2 to 5 As shown, the ultrasonic lifting device 1 is equipped with a solid-phase particle cavity 11, an ultrasonic transducer 12, and a rectifier structure 13. The ultrasonic transducer 12 is located at the bottom of the solid-phase particle cavity 11, and the rectifier structure 13 is located above the solid-phase particle cavity 11. The ultrasonic transducer 12 is used to vibrate and lift the solid lubricating particles in the solid-phase particle cavity 11, and mix them with the introduced dry high-pressure gas to form a gas-solid mixture. The top of the ultrasonic lifting device 1 is provided with a first output port 14. After the gas-solid mixture is rectified by the rectifier structure 13, it is transported to the counter-impact device 2 through the first output port 14.

[0086] The ultrasonic transducer 12 is fixedly installed at the bottom of the solid-phase microparticle cavity 11 and is in contact with the solid-phase lubricating microparticles stored in the solid-phase microparticle cavity 11; the bottom installation method can ensure that all microparticles in the cavity can be subjected to sufficient ultrasonic excitation.

[0087] The rectifying structure 13 is fixedly installed directly above the solid-phase particle chamber 11, between the vibration lifting zone and the output port; this position allows the gas-solid mixture that has just completed lifting and mixing to be rectified and homogenized before the particles settle and agglomerate.

[0088] The ultrasonic transducer 12 generates a high-frequency sinusoidal vibration of 20~35kHz, which excites the solid lubricating particles in the solid microparticle cavity 11 to produce violent relative motion, causing collisions, splashing, breaking and refining, and lifting to form a suspended microparticle aerosol. At the same time, the dry high-pressure gas introduced flows from the bottom upwards, fully contacting and mixing with the suspended particles to form a uniform and stable gas-solid mixture. The ultrasonic lifting method solves the problem of easy agglomeration and difficulty in dispersion of submicron / nano-scale solid microparticles.

[0089] The ultrasonic lifting device 1 has a first output port 14 at the center of its top end face. The gas-solid mixture after lifting and mixing flows upward through the rectification structure 13. The rectification structure 13 homogenizes and rectifies the turbulent gas-solid two-phase flow, eliminates local concentration inhomogeneity and flow velocity fluctuations, and forms a gas-solid mixture with uniform concentration and stable flow velocity. Then, it is stably transported to the downstream counter-flushing device 2 through the first output port 14 at the top.

[0090] The bottom-mounted design of the ultrasonic transducer 12 in this embodiment ensures that the vibration energy is fully applied to all solid particles. The high-frequency ultrasonic excitation completely solves the problem of easy agglomeration and difficulty in dispersion of submicron / nano-scale solid lubricating particles, and realizes efficient lifting and uniform suspension of particles. The rectifier structure 13 is set at a key position between the lifting area and the output port, and completes rectification and homogenization in time before the particles settle, ensuring the uniformity of the concentration and the stability of the flow rate of the output gas-solid mixture.

[0091] As an alternative solution, such as Figures 2 to 5 As shown, the ultrasonic lifting device 1 includes a hollow cylindrical shell 15; a solid-phase microparticle cavity 11, an ultrasonic transducer 12, and a rectifier structure 13 are disposed inside the hollow cylindrical shell 15, and a dryer 16 is fixedly installed on the side of the hollow cylindrical shell 15; a high-pressure air inlet 161 is provided on the dryer 16, and a pressure regulating switch 45 is provided on the high-pressure air inlet 161; the air outlet of the dryer 16 is connected to the solid-phase microparticle cavity 11; a first gas inlet 17 is also provided on the side wall of the hollow cylindrical shell near the ultrasonic transducer; high-pressure gas enters the dryer 16 through the high-pressure air inlet 161 for drying and then enters the solid-phase microparticle cavity 11; a pressure gauge 162 is also provided on the dryer 16, which is used to monitor the air inlet pressure to adjust the gas pressure inside the ultrasonic lifting device 1.

[0092] The ultrasonic lifting device 1 uses a hollow cylindrical shell 15 as the main load-bearing structure. The vertical arrangement of the cylindrical structure can minimize the settling and resistance during the flow of the gas-solid mixture. The solid particle cavity 11, ultrasonic transducer 12, and rectifier structure 13 are installed inside the hollow cylindrical shell 15 and arranged sequentially from bottom to top along the axis of the cylinder. The integrated design makes the entire ultrasonic lifting device 1 compact, easy to install and maintain, and avoids interference from the external environment on the internal gas-solid mixing process.

[0093] The dryer 16 is fixedly installed on the outer wall of the hollow cylindrical shell 15, forming an integral structure with the shell. The side-mounted layout does not occupy the vertical flow channel space inside the cylinder, and shortens the gas path distance from the outlet of the dryer 16 to the solid particle cavity 11, reducing pressure loss and secondary moisture absorption risk during gas transportation.

[0094] The ultrasonic lifting device has two independent air inlet channels. The outer end of the dryer 16 is provided with a high-pressure air inlet 161, which is connected to the output pipe of the air source pretreatment device. A pressure regulating switch 45 is integrated on the high-pressure air inlet 161. The side wall of the hollow cylindrical shell is also provided with a first gas inlet 17, which is connected to the lower part of the solid phase particle cavity; a pressure regulating switch is independently integrated on each of the two air inlets.

[0095] The gas input through the high-pressure inlet 161 first enters a dryer for deep drying, completely removing trace amounts of moisture to ensure that the gas entering the solid-phase particle chamber is absolutely dry, preventing the solid-phase lubricating particles from deliquescing and clumping due to humid gas. The dried gas is then introduced into the solid-phase particle chamber from the top, providing a basic carrier gas for gas-solid mixing. The first gas inlet 17 is connected to the gas source pretreatment device, through which higher-pressure gas is input to the ultrasonic lifting device. This gas enters from the bottom of the solid-phase particle chamber, forming a strong upward airflow that better lifts the solid-phase lubricating particles. This assists ultrasonic vibration in further enhancing the particle lifting effect and preventing large particles from settling and accumulating.

[0096] A pressure gauge 162 is integrated on the dryer 16 to monitor the inlet pressure of the ultrasonic lifting device 1 in real time. The operator can adjust the inlet pressure by adjusting the pressure switch 45 according to the value displayed by the pressure gauge 162, so that the gas pressure in the solid particle chamber 11 is stably controlled within the optimal working range of 0.1~0.8MPa, thereby realizing the regulation of gas-solid mixing intensity and particle output.

[0097] In this embodiment, the vertical flow channel design of the hollow cylindrical shell 15 ensures smooth flow of the gas-solid mixture without sedimentation; the side-mounted dryer 16 solves the problem of solid particles deliquescence and agglomeration, and the dual independent air intake combined with independent pressure regulation design further enhances the particle lifting effect through high-pressure assisted air intake. The integrated configuration of the pressure regulating switch 45 and the pressure gauge 162 enables visualized control of the air intake pressure, allowing flexible adjustment of the gas-solid mixing intensity and particle output according to different drilling process requirements.

[0098] As an alternative solution, such as Figures 3 to 5 As shown, the rectification structure 13 includes a top cover plate 131 of the device base and a perforated rectifier filter element 132. The top cover plate 131 of the device base is fixed to the inner wall of the hollow cylindrical shell 15 and is located directly above the ultrasonic transducer 12. The top cover plate 131 of the device base has dense perforations. The space between the top cover plate 131 of the device base and the ultrasonic transducer 12 forms a solid-phase microparticle cavity 11. The perforated rectifier filter element 132 is fixed to the upper side of the top cover plate 131 of the device base. The perforated rectifier filter element 132 has an elongated perforation structure. The gas-solid mixture is rectified by the dense perforations of the top cover plate 131 of the device base and the perforated rectifier filter element 132 in sequence, and then output from the first output port 14.

[0099] The upper cover plate 131 of the device base is horizontally fixed on the inner wall of the hollow cylindrical shell 15, positioned directly above the ultrasonic transducer 12, with a distance of 1.0~10.0mm between the upper cover plate 131 and the ultrasonic transducer 12. The position of the upper cover plate 131 is designed to provide sufficient space for the ultrasonically vibrated particles to be lifted, so that the newly lifted particles immediately come into contact with and mix with the airflow passing through the small holes in the cover plate, thus preventing the particles from settling.

[0100] The device base has densely packed small holes evenly distributed on the upper cover plate 131, with a hole diameter ≤1mm. The closed space between the lower surface of the upper cover plate 131 and the upper surface of the ultrasonic transducer 12 is the solid phase particle cavity 11, which is used to store solid phase lubricating particles. The densely packed small holes allow the dry high-pressure gas to be uniformly passed downward into the solid phase particle cavity 11, and allow the particles after being lifted to pass upward uniformly, so as to achieve the initial uniform mixing of the gas and solid phases.

[0101] The small-hole rectifying filter element 132 is horizontally and fixedly installed directly above the cover plate 131 on the device base, fitting tightly against the cover plate without gaps, ensuring that all gas-solid mixtures must be rectified through the small holes of the filter element. The small-hole rectifying filter element 132 adopts an elongated small-hole structure with a depth-to-diameter ratio ≥15. The elongated small-hole structure has a stronger homogenizing effect on the passing gas-solid mixture, effectively eliminating local concentration unevenness and flow rate fluctuations, while further breaking down and dispersing any possible micro-agglomerates.

[0102] After being ultrasonically agitated, the solid lubricating microparticles and dry high-pressure gas are initially mixed in the solid microparticle cavity 11. First, they are rectified by passing through the dense small holes of the cover plate 131 above the device base to achieve initial uniform dispersion of the gas and solid phases. Then, they continue to be rectified by passing through the elongated small holes of the small hole rectifier filter element 132 to achieve secondary fine rectification, further eliminating the non-uniformity of concentration and flow rate. After two stages of rectification, the uniform and stable gas-solid mixture is finally output to the counter-flushing device 2 through the first output port 14 at the top.

[0103] In this embodiment, the rectifier structure 13 adopts a two-stage rectification approach, which combines a primary rectifier with dense small holes in the upper cover plate 131 of the device base and a secondary fine rectifier with extended small holes in the small hole rectifier filter element 132. This results in a uniform concentration and stable flow rate of the output gas-solid mixture, providing stable and reliable input conditions for the subsequent mixing and blending of the counter-flushing device 2.

[0104] As an alternative solution, such as Figure 13 As shown, the powder supply and dust collection device 3 also includes a cantilever 31, a pneumatic support base 32, and a cylinder 33; the cantilever 31 is fixed to the outside of the device housing 36, and the cantilever 31 is fixedly connected to the pneumatic support base 32; the pneumatic support base 32 is fixed to the outside of the drilling electric spindle, and the telescopic end of the cylinder 33 is hinged to the pneumatic support base 32 to drive the powder supply and dust collection device 3 to synchronously feed and reset with the drill chuck.

[0105] One end of the cantilever 31 is fixedly installed on the outer wall of the housing of the powder supply and dust collection device 3, and the other end of the cantilever 31 is fixedly connected to the pneumatic support base 32. The cantilever 31 connection structure allows the powder supply and dust collection device 3 to be suspended directly below the electric spindle, corresponding to the position of the drill chuck and drill bit.

[0106] The pneumatic support base 32 is fixedly installed on the outer housing of the drilling electric spindle, serving as the installation reference for the entire feed mechanism. The integrated installation design with the electric spindle ensures the relative positional accuracy of the supply nozzle 37 and the drill chuck, preventing positional deviations caused by machine tool movement.

[0107] The cylinder body of cylinder 33 is fixedly mounted on the machine tool frame, and the telescopic end of cylinder 33 is connected to pneumatic support seat 32 by a hinge. The hinge can automatically compensate for installation errors and slight runout during the movement, ensuring smooth and stable feed movement.

[0108] During drilling, cylinder 33 extends, driving the pneumatic support 32, cantilever 31, and powder supply and dust collection device 3 to feed downward along the drill bit axis, ensuring that the supply nozzle 37 is always maintained at the optimal spray distance from the workpiece surface. After drilling is completed, cylinder 33 retracts, driving the powder supply and dust collection device 3 to synchronously reset upward, avoiding space for tool changing and workpiece loading and unloading. Synchronous feeding ensures that the lubricating medium can be sprayed into the drilling area throughout the entire drilling process.

[0109] In this embodiment, the integrated installation of the powder supply and dust collection device 3 with the electric spindle ensures the relative positional accuracy between the supply nozzle 37 and the drill chuck, guaranteeing that the lubricating medium is sprayed into the processing area, realizing automatic lubrication throughout the drilling process, thereby ensuring the lubrication effect and the degree of automation in deep micro-hole drilling of hard core substrates.

[0110] As an alternative solution, such as Figure 10 , Figure 11 As shown, the powder supply and dust collection device 3 also includes a diffuser core 34 and a dust collection interface 35. The diffuser core 34 is interference-fitted into the internal cavity of the device housing 36 and is positioned above the supply nozzle 37. The diffuser core 34 is an integral annular cylindrical structure, with an axially penetrating drill chuck clearance through hole 341 at its center. Multiple guide fan blades with helical angles are radiating outward from the central drill chuck clearance through hole of the diffuser core 34, forming a helical channel 343 between adjacent guide fan blades. A ring-shaped pressure equalizing groove 342 is formed in the middle section of the guide fan blades to balance the pressure of each helical channel 343. The inner curvature of the helical channel 343 is greater than that of the outer curvature, and the flow cross section of the helical channel 343 gradually increases radially outward to form an arc-shaped cavity. The inner end of the helical channel 343 connects to the internal cavity of the device housing 36, and the outer end connects to the dust collection interface 35.

[0111] The diffuser rectifier core 34 is embedded and fixed in the internal cavity of the device housing 36 by an interference fit, without the need for additional fasteners, making installation convenient and with good sealing performance; the diffuser rectifier core 34 is located above the supply nozzle 37, between the drill chuck rotation space and the supply nozzle 37.

[0112] The diffuser rectifier core 34 adopts an integrated annular cylindrical structure with high structural strength and regular flow channel. A drill chuck clearance through hole 341 is opened in the center, through which the drill chuck passes. The inner wall of the through hole maintains a small gap of 0.1mm to 0.5mm with the outer circle of the drill chuck. This not only does not interfere with the high-speed rotation of the drill chuck, but also forms a small throttling gap, which plays a sealing role and prevents the gas-solid mixture inside the device housing 36 from leaking outward.

[0113] The diffuser core 34 is provided with multiple guide fan blades with helical angles radiating outward from the central drill chuck clearance through hole. Helical channels 343 are formed between adjacent guide fan blades. In this embodiment, the number of helical channels is preferably not less than 24. A ring-shaped pressure equalization groove 342 is opened in the middle section of the guide fan blade to connect each helical channel and thus balance the pressure of each helical channel, ensuring uniform and consistent suction throughout the circumference.

[0114] The spiral channel 343 adopts a variable curvature design, with the inner curvature being greater than the outer curvature, forming a flow channel that bends outward, which conforms to the flow law of rotating airflow. The flow cross section of the spiral channel 343 gradually increases radially outward, forming a diffuser arc cavity. When the airflow passes through the arc cavity, the flow velocity decreases and the pressure increases, forming a pressure gradient from the inside to the outside, which automatically drives the chips and particles to flow outward.

[0115] The airflow generated by the high-speed rotation of the drill chuck exhibits a distribution characteristic of downward from the center and upward and outward from the periphery. The airflow in the small central area near the axis of rotation is drawn downward, responsible for delivering new lubricating medium to the cutting zone at the drill tip. The chips generated by the drill cutting are automatically discharged upward from the deep hole along the drill bit's spiral chip removal grooves. Excess lubricating powder mixed in the chips also moves upward along with them. In addition, the centrifugal force of rotation drives the peripheral airflow upward and outward, and the backflush effect of compressed air in the deep hole causes these chips and excess lubricating powder to gather and float around the upper part of the drill bit.

[0116] The upper part of the drill bit is located inside the spiral channel 343, which is connected to the internal cavity of the device housing 36. The outer end of the spiral channel 343 converges and connects to the dust extraction port 35. The high-speed rotation of the drill chuck drives the surrounding airflow to rotate synchronously, carrying chips and excess lubricating particles into the spiral channel 343. Under the combined action of the air pressure gradient and the external negative pressure dust extraction system, the airflow flows outward along the spiral channel 343 and is finally extracted and recycled through the dust extraction port 35.

[0117] In this embodiment, the powder supply and dust collection device 3 adopts an integrated diffuser rectifier core 34 and a dust collection interface 35. Without affecting the supply of lubricating medium, it realizes the dust-free processing and automatic chip recovery, avoids the impact of chip accumulation on drilling quality, and thus ensures the processing quality and cleanliness of deep micro-hole drilling of hard core substrates.

[0118] As an alternative solution, such as Figures 10 to 12 As shown, the supply nozzle 37 has a disc-shaped structure and is embedded in a circular mounting hole at the bottom of the device housing 36. The lower end face of the supply nozzle 37 is flush with the lower end face of the device housing 36. A downwardly recessed funnel-shaped clearance groove 371 is formed at the center of the upper end face of the supply nozzle 37, and an axially penetrating main nozzle hole 372 is formed at the center of the bottom of the funnel-shaped clearance groove 371. The drill chuck passes through the central through hole of the diffuser rectifier core 34 from above and then enters the main nozzle hole 372. The drill bit extends from the lower end of the main nozzle hole 372. The side wall of the device housing 36 has radially extending... The medium input channel 373 has an outer end forming a medium input end 374. A radial powder inlet 375 is provided at a corresponding position on the side wall of the supply nozzle 37. The radial powder inlet 375 is coaxially connected to the medium input channel 373 and is sealed and connected. An annular distribution channel is provided inside the supply nozzle 37, and the radial powder inlet 375 is connected to the annular distribution channel. Multiple axially penetrating auxiliary nozzles 376 are evenly distributed circumferentially on the outer peripheral end face of the funnel-shaped clearance groove 371, and the upper ends of the multiple auxiliary nozzles 376 are all connected to the annular distribution channel.

[0119] The supply nozzle 37 adopts an embedded installation structure with a compact design. The flush design of the lower end face avoids interference with the workpiece surface caused by the nozzle protrusion, ensuring that the nozzle can be as close to the workpiece surface as possible during drilling and shortening the spray distance.

[0120] A downward-recessed funnel-shaped clearance groove 371 is provided at the center of the upper end face of the supply nozzle 37 to provide clearance space for the lower end of the drill chuck and avoid interference between the drill chuck and the nozzle when it rotates; an axially penetrating main spray hole 372 is provided at the center of the bottom of the funnel-shaped clearance groove 371 to form the working channel of the drill bit.

[0121] During assembly, the drill chuck passes sequentially from above through the central through hole of the diffuser core 34 and the main nozzle 372 of the supply nozzle 37, with the drill bit extending from the lower end of the main nozzle 372. The diameter of the main nozzle 372 is 0.1–0.5 mm, and its inner wall maintains a small gap with the outer circle of the drill bit, which neither interferes with the rotation and feed of the drill bit, but also forms an annular spray gap, allowing the lubricating medium to flow downward along the outer wall of the drill bit to reach the cutting edge.

[0122] The side wall of the device housing 36 has a radially extending medium input channel 373, and the outer end of the channel forms a medium input end 374, which is connected to the second output port of the counter-flush device 2 through a pipe. After the solid phase composite lubricating medium is output from the counter-flush device 2, it enters the supply nozzle 37 through this channel.

[0123] The medium input channel 373 is processed using a shell cross-drilling process. First, a straight hole is drilled from the outer side wall of the device shell 36 along the horizontal radial direction to the inner mounting cavity side wall. Then, it is drilled from the mounting cavity side wall along the vertical direction upward, intersecting and connecting with the horizontal hole inside the shell body to form an L-shaped flow channel.

[0124] After drilling, the exposed vertical process hole openings on the sidewall can be reliably sealed by means of screw plugs, steel ball expansion plugs, or welding to prevent medium leakage or nozzle blockage in the flow channel. The horizontal hole at the outer end of the L-shaped flow channel is the medium input end 374, and the outlet of the vertical hole at the upper end is coaxially connected to the radial powder inlet on the sidewall of the supply nozzle 37.

[0125] A radial powder inlet 375 is provided on the side wall of the supply nozzle 37, which is coaxially connected to the medium input channel 373 of the device housing 36. The contact surface is sealed to prevent leakage. The coaxial connection ensures smooth medium flow without turning resistance or pressure loss. The supply nozzle 37 has a complete annular distribution channel inside. The solid-phase composite lubricating medium input through the radial powder inlet 375 first enters the annular distribution channel, where pressure is evenly distributed, making the medium pressure uniform throughout the circumference and avoiding uneven circumferential pressure caused by powder input from one side.

[0126] On the outer peripheral end face of the funnel-shaped clearance groove 371, multiple axially penetrating auxiliary nozzles 376 are evenly distributed along the circumference. The upper ends of all auxiliary nozzles 376 are connected to the annular distribution channel. The pressure-equalized solid-phase composite lubricating medium is simultaneously sprayed downward through multiple auxiliary nozzles 376, forming a uniform annular lubricating medium curtain on the outer periphery of the drill bit, which covers the drilling area in all directions and, together with the rotation of the drill bit, carries the lubricating medium into the hole wall and cutting area of ​​the deep micro-hole.

[0127] In this embodiment, the nozzle 37 adopts a disc-embedded structure, combined with the integrated design of funnel-shaped avoidance, central main spray hole 372, annular distribution channel, and circumferential auxiliary spray hole 376. Through uniform spraying and positioning, the utilization rate of composite lubricating medium is ensured, and drill bit wear is reduced.

[0128] As an alternative solution, such as Figure 1As shown, the air source pretreatment device includes a high-pressure air source 41, a venting silencer pipe 42, and an air filter 43; the outlet of the high-pressure air source 41 is connected to the inlet of the air filter 43; a pressure relief switch 44 is installed on the connecting pipe between the air filter 43 and the venting silencer pipe 42; the air filter 43 is connected to the ultrasonic lifting device 1 and the counter-impact device 2 through pipes, and pressure regulating switches 45 are installed on the pipes respectively.

[0129] Air filter 43 is a gas drying and filtering component; pressure relief switch 44 is an overpressure automatic pressure relief control valve; pressure regulating switch 45 is a pressure regulating control valve; venting silencer pipe 42 is a silencer component for overpressure relief.

[0130] The main output pipe of the air filter 43 is branched to a venting and silencer pipe 42, and a pressure relief switch 44 is installed on the branch pipe. When the system pressure exceeds the set safety threshold, the pressure relief switch 44 opens, and the overpressure gas is discharged silently through the venting and silencer pipe 42 to avoid damage to system components due to excessive pressure and to ensure the safe operation of the system.

[0131] The output end of the air filter 43 is connected to the ultrasonic lifting device 1 and the counter-pressure device 2 respectively; the design of independent air supply in separate circuits ensures that the air pressure regulation of the ultrasonic lifting device 1 and the counter-pressure device 2 does not interfere with each other, and the working pressure can be set independently according to their respective process requirements to achieve more precise control.

[0132] A high-pressure gas source 41 is connected to two pipelines of the ultrasonic lifting device 1 and the counter-flushing device 2. The outlet of the high-pressure gas source 41 is connected to the first gas inlet 17 of the ultrasonic lifting device and the second gas inlet 225 of the counter-flushing device, respectively, for inputting dry high-pressure gas. A pressure regulating switch 45 is independently installed on the connecting pipelines of the ultrasonic lifting device 1 and the counter-flushing device 2. The pressure regulating switch can independently adjust the working pressure of its respective gas supply according to the pressure gauge, with an adjustment range of 0.1~0.8MPa. Based on different high-frequency hard core substrate materials, drill bit diameters, and drilling parameters, the ultrasonic lifting intensity and counter-flushing dilution ratio can be flexibly matched to achieve control over the output quantity and concentration of the solid-phase composite lubricating medium.

[0133] In this embodiment, the gas source pretreatment device constructs a stable and reliable high-pressure gas source 41 system. The entire gas source system has stable pressure and is dry and clean, providing a stable gas source guarantee for the stable operation of the entire solid-phase composite lubricating medium loading system.

[0134] According to another aspect of the invention, such as Figure 14 As shown, a method for loading a solid-phase composite lubricating medium for drilling hard-core substrates is also provided, comprising the following steps:

[0135] Step S101: After drying and filtering the high-pressure gas, dry high-pressure gas is output and divided into two paths. The first path is delivered to multiple sets of ultrasonic lifting devices 1, and the second path is delivered to the counter-current device 2.

[0136] Step S102: Solid lubricating microparticles of different materials inside multiple sets of ultrasonic lifting devices 1 are lifted by ultrasonic vibration and mixed with the introduced dry high-pressure gas to form a gas-solid mixture of the corresponding material. After rectification, the mixture is delivered to the counter-impact device 2.

[0137] In step S103, the dry high-pressure gas and multiple gas-solid mixtures are coaxially opposed in the opposing chamber 21 of the opposing device 2 to form a solid-phase composite lubricating medium, which is then transported to the powder supply and dust collection device 3.

[0138] In step S104, the solid-phase composite lubricating medium is sprayed into the drilling area through the supply nozzle 37 of the powder supply and dust collection device 3, and the high-speed rotation of the drill chuck carries the solid-phase composite lubricating medium into the periphery and wall of the deep micro-hole.

[0139] The pressure of the gas source pretreatment device is set to 0.8MPa~1.0MPa, and the total gas flow pressure of solid phase micro-lubrication is ≥0.8MPa. The gas source pretreatment device includes an air filter 43, which dries the high-pressure gas. If the gas source pressure is too high, the internal pressure relief switch of the gas source pretreatment device will be automatically opened, and the gas will be released and vented through the venting and silencer pipe 42. The gas source pretreatment device is connected to the ultrasonic lifting device 1 and the counter-flushing device 2 through pipelines, and pressure regulating switches 45 are installed on the pipelines respectively.

[0140] Multiple ultrasonic lifting devices 1 are set up to carry different types of solid lubricating particles. The control power supply of the ultrasonic lifting device 1 is adjusted, and the input sinusoidal vibration frequency of the ultrasonic lifting device 1 is set to 20~35kHz. The maximum input voltage is less than 200V and is adjustable. The pressure regulating switch 45 is adjusted to make the airflow pressure 0.1~0.8MPa. The pressure-regulated airflow enters the ultrasonic lifting device 1, and the solid lubricating particles are lifted by high-frequency vibration. The airflow is loaded above the lifting device base and the ejected solid lubricating particles are transported to the upper rectifier filter element. After being rectified by small holes, they are output to the counter-flushing device 2.

[0141] The ultrasonic lifting output has a high concentration of gas-solid mixture. Through coaxial counter-current method, it achieves efficient and uniform mixing of dry high-pressure gas with various gas-solid mixtures, completes secondary dilution, and forms a solid-phase composite lubricating medium with controllable concentration and uniform composition. This enables the regulation of micro-lubrication and fully leverages the synergistic effect of different lubricating particles.

[0142] For deep micro-holes on hard-core substrates with a diameter <0.1mm and a depth-to-diameter ratio >10, lubricating media cannot easily enter the hole on its own. By supplying lubricating media through nozzle 37 and coordinating with the rotation of the drill chuck, a solid-phase composite lubricating medium can be introduced into the hole wall and cutting zone of the deep micro-hole, acting on the contact interface between the drill bit and the workpiece. This fully utilizes the lubrication, friction reduction, and heat absorption cooling effects, significantly reducing drilling force, minimizing drill wear, and improving the machining quality of deep micro-holes.

[0143] The solid-phase composite lubricating medium is sprayed into the drilling area through the supply nozzle of the powder supply and dust collection device. It can also work in conjunction with the high-speed rotation of the drill chuck and ultrasonic-assisted vibration to carry the lubricant into the periphery and wall of the deep micro-hole. The vibration mode of the ultrasonic-assisted vibration can be vertical reciprocating motion, torsional motion, elliptical motion, etc., and can be applied to the drill bit or the powder supply and dust collection device.

[0144] This method solves the problem of microparticle deliquescence and agglomeration through air source drying and filtration; ultrasonic lifting enables stable dispersion and independent delivery of various lubricating microparticles; coaxial counter-clamping enables uniform compounding and micro-control of multiple media; and the rotary suction of the drill chuck can accurately deliver the composite lubricating medium to the drill tip and the wall of the deep micro-hole, thereby improving the processing quality and production efficiency of deep micro-holes on hard core substrates.

[0145] As an optional solution, the method also includes: the circumferential rotation of the drill chuck drives the surrounding airflow to rotate synchronously. After the airflow enters the spiral channel 343 of the diffuser rectifier core 34, the flow cross section of the spiral channel 343 gradually expands radially outward, forming an air pressure gradient from the inside to the outside. Under the action of the air pressure gradient, the chips generated by drilling and the excess solid-phase composite lubricating medium flow outward along the spiral channel 343 and are collected at the dust collection interface 35. The collected chips and excess solid-phase composite lubricating medium are extracted and recycled by the continuous negative pressure suction provided by the external negative pressure dust collection system connected to the dust collection interface 35.

[0146] During drilling, a large number of fine chips and excess lubricating medium that is not fully utilized are generated. The airflow is driven by the kinetic energy of the drill chuck's own rotation, which is energy-efficient and effective. The diffuser structure of the spiral channel 343 reduces the airflow velocity and increases the pressure, automatically forming an air pressure gradient from the inside to the outside. This provides a self-driving force for the flow of chips and excess medium, achieving a self-guiding effect without additional power.

[0147] Utilizing the self-driven air pressure gradient within the spiral channel 343, chips and excess lubricant can be actively pushed from the machining area to the dust collection port 35, significantly improving recovery efficiency. Under the action of the self-driven air pressure gradient, the fine chips generated during drilling and the underutilized excess solid-phase composite lubricant are actively pushed outward along the spiral channel 343 and automatically collected at the dust collection port 35. This not only avoids the accumulation of chips in the machining area affecting drilling accuracy and prevents dust pollution caused by the outward diffusion of lubricant, but also realizes the recycling and reuse of excess lubricant.

[0148] A self-driven air pressure gradient pushes and collects chips and media to the suction port 35, while an external negative pressure system provides continuous negative pressure to ensure a stable and continuous recovery process. Excess lubricating media recovered can be reused after filtration, reducing production costs and improving the processing environment by avoiding the health effects of dust on operators.

[0149] This embodiment of the efficient and energy-saving method for simultaneous recovery of chips and lubricating media utilizes the kinetic energy of the drill chuck's own rotation to drive airflow. Combined with the special spiral channel 343 structure of the diffuser rectifier core 34, an air pressure gradient is automatically formed from the inside out, achieving self-driven pushing and collection of chips and excess media without the need for additional power, thus saving energy and achieving high efficiency. Combined with the continuous suction of the external negative pressure dust collection system, the complete recovery of chips and excess media is achieved.

[0150] As an optional approach, the method further includes: adjusting the air intake pressure of at least one set of ultrasonic lifting devices 1 and counter-pressure devices 2 in real time according to the current drilling process parameters, or adjusting the voltage of ultrasonic lifting devices 1 to adapt to the total input of solid-phase composite lubricating medium; wherein the drilling process parameters include drill bit diameter, hard core substrate thickness, drilling spindle speed and feed rate.

[0151] Different drilling process parameters have significantly different requirements for lubricating media. The larger the drill bit diameter, the thicker the base plate, the higher the rotation speed, and the faster the feed, the greater the frictional heat and drilling force, and the more lubricating media is required. A fixed lubrication supply will result in insufficient lubrication under high-parameter conditions or wasted lubrication under low-parameter conditions.

[0152] By adjusting the inlet pressure of the ultrasonic lifting device 1 in real time, the lifting intensity and output of solid particles can be dynamically adjusted; by adjusting the inlet pressure of the counter-flushing device 2 in real time, the dilution ratio can be dynamically adjusted. The combination of these two adjustments allows for flexible adjustment of the total output concentration and flow rate of the solid composite lubricating medium within a wide range, matching the lubrication requirements of different process parameters.

[0153] Adjusting only the air pressure has limited precision. For the fine adjustment required for micro-lubrication, the ultrasonic vibration intensity can be more precisely controlled by adjusting the operating voltage of the ultrasonic transducer 12, thereby further controlling the amount of solid particles lifted and achieving fine adjustment of the lubricating medium input. The control power supply of the ultrasonic lifting device 1 is adjusted with a maximum input voltage of <200V; by adjusting the voltage of the ultrasonic lifting device 1, the input amount of solid lubricant can be accurately matched, ensuring sufficient lubrication and avoiding excessive waste.

[0154] Different tool models correspond to different drill bit diameters, which in turn affect the cutting edge length and friction area; dissimilar materials of hard core substrates correspond to different substrate thicknesses, which in turn affect the drilling stroke and continuous friction time; the drilling spindle speed and feed rate affect the frictional heat generation and drilling force, and these parameters determine the amount of lubricating medium required.

[0155] By using preset tool models and different materials of hard core substrates as adjustment criteria, a correspondence between the lubrication medium input and core process parameters is established, which can achieve the matching of lubrication parameters and drilling process, ensuring that the optimal lubrication effect can be obtained under different process parameters.

[0156] This method establishes a corresponding adjustment relationship between core drilling process parameters and the amount of lubricating medium input, thereby achieving adaptive control of solid-phase composite lubricating medium. This ensures the scientific nature and targeted nature of the adjustment, maximizing the conservation of lubricating medium and reducing processing costs while guaranteeing optimal lubrication effect.

[0157] It should be noted that the term "comprising" and its variations used in the embodiments of this invention are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The modifications of "one" and "a plurality" mentioned in the embodiments of this invention are illustrative and not restrictive, and those skilled in the art should understand that unless explicitly indicated otherwise in the context, they should be understood as "one or more".

[0158] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the embodiments of this invention are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0159] The steps described in the method embodiments provided by the present invention can be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of protection of the present invention is not limited in this respect.

[0160] The term "embodiment" in this specification refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily imply the same embodiment, nor does it imply independence or alternativeity from other embodiments. The various embodiments in this specification are described in a related manner, with reference to each other for similar or identical parts. In particular, for apparatus, device, and system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, and relevant details are referred to in the description of the method embodiments.

[0161] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A loading system for a solid-phase composite lubricating medium for drilling hard-core substrates, characterized in that, include: Air source pretreatment device, multiple sets of ultrasonic lifting devices (1), counter-current device (2) and powder supply and dust collection device (3); The gas source pretreatment device is connected to the counter-flush device (2) and multiple sets of ultrasonic lifting devices (1) respectively, and is used to input dry high-pressure gas; Each ultrasonic lifting device (1) carries solid lubricating particles of different materials. The solid lubricating particles are mixed with the dry high-pressure gas to form a gas-solid mixture and then transported to the counter-impact device (2). The flushing device (2) has a flushing chamber (21) inside, and a gas nozzle (22) is provided at the top of the flushing chamber (21). The gas nozzle (22) is connected to the gas source pretreatment device. The bottom of the flushing chamber (21) has a gas-solid nozzle (23), and the gas-solid nozzle (23) is connected to multiple sets of ultrasonic lifting devices (1). The gas nozzle (22) has a conical concave structure, and the gas-solid nozzle (23) has a conical structure. The conical concave structure and the conical structure are arranged opposite to each other. The lower side wall of the counter-flush chamber (21) is provided with a second output port (24) at a position flush with the height of the gas-solid nozzle (23), and the solid phase composite lubricating medium is transported to the powder supply and dust collection device (3) through the second output port (24). The powder supply and dust collection device (3) is provided with a device housing (36) and a supply nozzle (37); the supply nozzle (37) is fixed to the bottom of the device housing (36), the medium input end (374) of the supply nozzle (37) is connected to the second output port (24), and the output end of the supply nozzle (37) faces the drilling processing area of ​​the drill chuck.

2. The loading system for a solid-phase composite lubricating medium for drilling hard-core substrates according to claim 1, characterized in that, The gas nozzle (22) is an integral structure consisting of a first disc flange (221) and a conical concave nozzle (222); The lower end of the conical concave nozzle (222) is recessed inward to form a conical cavity (223); an axially penetrating gas nozzle (224) is provided at the apex of the cavity. The upper surface of the first disc flange (221) is provided with a second gas inlet (225), which is connected to the upper end of the gas nozzle (224).

3. The loading system for solid-phase composite lubricating medium for drilling hard-core substrates according to claim 1, characterized in that, The gas-solid nozzle (23) is an integral structure consisting of a second disc flange (231) and a conical boss (232), and a horizontal annular mounting platform (27) is formed between the root of the conical boss (232) and the upper surface of the disc flange. The conical boss (232) has a premixing chamber (233) inside, and an axially penetrating gas-solid spray hole is opened at the apex of the conical boss (232). The lower end of the gas-solid spray hole is connected to the premixing chamber (233). The lower end face of the second disc flange (231) is provided with a first gas-solid input port (234), and the side wall of the counter-impact device (2) is provided with a second gas-solid input port (235). The first gas-solid input port (234) and the second gas-solid input port (235) are both connected to the premixing chamber (233) to form two independent gas-solid input channels, which are respectively connected to the gas-solid mixture output by different ultrasonic lifting devices (1).

4. The loading system for a solid-phase composite lubricating medium for drilling hard-core substrates according to claim 3, characterized in that, The counter-flush device (2) includes a hollow cylindrical shell (25), the gas nozzle (22) is fixed to the top end face of the hollow cylindrical shell (25), and the gas-solid nozzle (23) is fixed to the bottom end face of the hollow cylindrical shell (25). The gas nozzle (22), the gas-solid nozzle (23), and the hollow cylindrical shell (25) together form a closed cylindrical counter-current cavity (21). The cylindrical punch cavity (21) is also provided with a perforated core (26), which is an annular structure with a through hole in the center; the perforated core (26) is sleeved on the lower outer periphery of the conical boss (232), and the lower end face of the perforated core (26) is attached to the horizontal annular mounting platform (27). The outer wall of the shaped core (26) is attached to the inner wall of the hollow cylindrical shell (25) to receive solid particles settled by gravity and regulate the counter-current airflow.

5. The loading system for a solid-phase composite lubricating medium for drilling hard-core substrates according to claim 1, characterized in that, The ultrasonic lifting device (1) is equipped with a solid microparticle cavity (11), an ultrasonic transducer (12) and a rectifier structure (13). The ultrasonic transducer (12) is disposed at the bottom of the solid-phase microparticle cavity (11), and the rectifier structure (13) is disposed above the solid-phase microparticle cavity (11). The ultrasonic transducer (12) is used to vibrate and lift the solid lubricating particles in the solid particle cavity (11) and mix them with the introduced dry high-pressure gas to form a gas-solid mixture. The top of the ultrasonic lifting device (1) is provided with a first output port (14). After the gas-solid mixture is rectified by the rectifier structure (13), it is transported to the counter-current device (2) through the first output port (14).

6. The loading system for a solid-phase composite lubricating medium for drilling hard-core substrates according to claim 5, characterized in that, The ultrasonic lifting device (1) includes a hollow cylindrical shell (15). The solid-phase microparticle cavity (11), ultrasonic transducer (12) and rectifier structure (13) are disposed inside the hollow cylindrical shell (15), and a dryer (16) is fixedly installed on the side of the hollow cylindrical shell (15). The dryer (16) is provided with a high-pressure air inlet (161), and a pressure regulating switch (45) is provided on the high-pressure air inlet (161). The air outlet of the dryer (16) is connected to the solid-phase microparticle cavity (11). The hollow cylindrical shell is also provided with a first gas inlet (17) near the side wall of the ultrasonic transducer. The high-pressure gas enters the dryer (16) through the high-pressure inlet (161) for drying and then enters the solid-phase particle chamber (11). High-pressure gas enters through two inlets and, after drying, is introduced into the solid-phase particle chamber. The dryer (16) is also equipped with a pressure gauge (162), which is used to monitor the intake pressure to adjust the gas pressure in the ultrasonic lifting device (1).

7. The loading system for a solid-phase composite lubricating medium for drilling hard-core substrates according to claim 6, characterized in that, The rectifying structure (13) includes a cover plate (131) on the top of the device base and a perforated rectifying filter element (132). The upper cover plate (131) of the device seat is fixed to the inner wall of the hollow cylindrical shell (15) and is located directly above the ultrasonic transducer (12). The upper cover plate (131) of the device seat has dense small holes, and the space between the upper cover plate (131) of the device seat and the ultrasonic transducer (12) forms a solid microparticle cavity (11). The small-hole rectifier filter element (132) is fixed on the upper side of the upper cover plate (131) of the device base. The small-hole rectifier filter element (132) has an elongated small hole structure. The gas-solid mixture is rectified by the dense small holes of the upper cover plate (131) of the device base and the small-hole rectifier filter element (132) in sequence, and then output from the first output port (14).

8. The loading system for a solid-phase composite lubricating medium for drilling hard-core substrates according to claim 1, characterized in that, The powder supply and dust collection device (3) also includes a cantilever (31), a pneumatic support base (32), and a cylinder (33). The cantilever (31) is fixed to the outside of the device housing (36), and the cantilever (31) is fixedly connected to the pneumatic support base (32); The pneumatic support base (32) is fixed to the outside of the drilling electric spindle. The telescopic end of the cylinder (33) is hinged to the pneumatic support base (32) to drive the powder supply and dust collection device (3) to follow the drill chuck for synchronous axial feeding and resetting.

9. The loading system for a solid-phase composite lubricating medium for drilling hard-core substrates according to claim 1, characterized in that, The powder supply and dust collection device (3) also includes a diffuser rectifier core (34) and a dust collection interface (35). The diffuser rectifier core (34) is interference-fitted into the internal cavity of the device housing (36), and the diffuser rectifier core (34) is disposed above the supply nozzle (37); The diffuser rectifier core (34) is an integral annular cylindrical structure, and the center of the diffuser rectifier core (34) is provided with an axially penetrating drill chuck clearance through hole (341). The diffuser core (34) is provided with multiple guide fan blades with helical angles radiating outward from the central drill chuck clearance through hole, and a helical channel (343) is formed between adjacent guide fan blades; a ring-shaped pressure equalization groove (342) is opened in the middle section of the guide fan blade to balance the pressure of each helical channel; The inner curvature of the spiral channel (343) is greater than that of the outer curvature, and the flow cross section of the spiral channel (343) gradually increases radially outward to form an arc-shaped cavity; the inner end of the spiral channel (343) is connected to the internal cavity of the device housing (36), and the outer end is connected to the dust suction interface (35).

10. The loading system for a solid-phase composite lubricating medium for drilling hard-core substrates according to claim 9, characterized in that, The supply nozzle (37) has a disc-shaped structure and is embedded in the circular mounting hole at the bottom of the device housing (36). The lower end face of the supply nozzle (37) is flush with the lower end face of the device housing (36). The upper end face of the supply nozzle (37) is provided with a downwardly recessed funnel-shaped clearance groove (371), and the bottom center of the funnel-shaped clearance groove (371) is provided with an axially penetrating main spray hole (372). The drill chuck passes through the central through hole of the diffuser rectifier core (34) from above and then enters the main nozzle (372), with the drill bit extending from the lower end of the main nozzle (372). The device housing (36) has a radially extending medium input channel (373) on its side wall, and the outer end of the medium input channel (373) constitutes a medium input end (374). The side wall of the supply nozzle (37) is provided with a radial powder inlet (375), which is coaxially connected to and sealed with the medium input channel (373); the supply nozzle (37) is provided with an annular distribution channel inside, and the radial powder inlet (375) is connected to the annular distribution channel. The funnel-shaped clearance groove (371) has a plurality of axially penetrating auxiliary nozzles (376) evenly distributed circumferentially on its outer peripheral end face, and the upper ends of the auxiliary nozzles (376) are all connected to the annular distribution channel.

11. The loading system for a solid-phase composite lubricating medium for drilling hard-core substrates according to claim 1, characterized in that, The gas source pretreatment device includes a high-pressure gas source (41), a gas exhaust silencer (42), and an air filter (43). The outlet of the high-pressure air source (41) is connected to the inlet of the air filter (43); A pressure relief switch (44) is provided on the connecting pipe between the air filter (43) and the venting silencer (42). The air filter (43) is connected to the ultrasonic lifting device (1) and the counter-current device (2) through pipes, and pressure regulating switches (45) are respectively installed on the pipes.

12. A method for loading a solid-phase composite lubricating medium for drilling hard-core substrates, characterized in that, include: After the high-pressure gas is dried and filtered, the dried high-pressure gas is output. The dried high-pressure gas is divided into two paths. The first path is delivered to multiple sets of ultrasonic lifting devices (1), and the second path is delivered to the counter-current device (2). The solid lubricating particles of different materials inside the multiple sets of ultrasonic lifting devices (1) are lifted by ultrasonic vibration and mixed with the introduced dry high-pressure gas to form a gas-solid mixture of the corresponding materials. After rectification, they are respectively transported to the counter-impact device (2). The dry high-pressure gas and multiple sets of the gas-solid mixture are coaxially opposed in the opposing chamber (21) of the opposing device (2) to form a solid-phase composite lubricating medium, which is then transported to the powder supply and dust collection device (3). The solid-phase composite lubricating medium is sprayed into the drilling area through the supply nozzle (37) of the powder supply and dust collection device (3), and the high-speed rotation of the drill chuck carries the solid-phase composite lubricating medium into the periphery and wall of the deep micro-hole.

13. The method for loading a solid-phase composite lubricating medium for drilling hard-core substrates according to claim 12, characterized in that, Also includes: The circumferential rotation of the drill chuck drives the surrounding airflow to rotate synchronously. After the airflow enters the spiral channel (343) of the diffuser rectifier core (34), the flow cross section of the spiral channel (343) gradually expands radially outward, forming a pressure gradient from the inside to the outside. Under the action of the air pressure gradient, the chips generated by drilling and the excess solid-phase composite lubricating medium flow outward along the spiral channel (343) and collect at the dust suction port (35); The collected chips and excess solid-phase composite lubricating medium are extracted and recycled by the continuous negative pressure suction provided by the external negative pressure suction system connected to the suction port (35).

14. The method for loading a solid-phase composite lubricating medium for drilling hard-core substrates according to claim 12, characterized in that, Also includes: According to the current drilling process parameters, adjust the air intake pressure of at least one set of ultrasonic lifting device (1) and counter-impact device (2) in real time, or adjust the voltage of the ultrasonic lifting device (1) to match the total input of solid phase composite lubricating medium. The drilling process parameters include drill bit diameter, hard core substrate thickness, drilling spindle speed, and feed rate.

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