CN114888625A - System and method for assisting cutting fluid to permeate into cutting area - Google Patents

Abstract

The invention relates to a system and method for assisting the infiltration of cutting fluid into a cutting area. Nano-capillary channels that can be quantitatively characterized and regulated are provided by nano-texturing of the blade surface, and the electrokinetic infiltration effect caused by the self-excited electric field of the friction interface in the cutting area is utilized to convert the The external magnetic field at a certain angle to the self-excited electric field acts on the cutting area. By adjusting the characteristics of the magnetic field and the parameters of the nano-texture structure, the Lorentz force generated by the interaction between the electric field and the magnetic field is introduced to drive the cutting fluid to penetrate into the cutting area, which solves the problem of cutting fluid. The problem cannot be efficiently penetrated in the nanoscale space of the cutting contact zone. The cutting fluid efficiently penetrates into the tool-chip or tool-worker contact area, and forms an effective lubricating film on the friction interface of the cutting area, which slows down the interface friction, resulting in the improvement of cutting performance such as cutting temperature, blade wear, and workpiece surface integrity. Compared with the existing method of infiltrating the cutting fluid into the cutting contact area, the method has the advantages of low driving energy field intensity, high efficiency, strong controllability, simple structure and the like, and is suitable for practical use.

Description

A system and method for assisting the penetration of cutting fluid into cutting area

technical field

The invention relates to the technical field of machining, in particular to a system and method for assisting the penetration of cutting fluid into a cutting area.

Background technique

During the cutting process, the application of cutting fluid can improve the cooling and lubrication condition of the tool-chip or tool-worker contact area, thereby improving the surface quality of the workpiece after machining and reducing the wear of the insert. According to different cutting conditions and cutting conditions, the ways for cutting fluid to penetrate into the cutting zone to play the role of cooling and lubrication include capillary penetration, clearance penetration caused by blade vibration, pore penetration caused by built-up edge, and chip lattice distortion defects in the first shear zone Infiltration, etc.; among them, the penetration of gaps, pores and lattice defects has little effect on the infiltration of cutting fluid to lift the tool-chip or tool-work interface; The capillary penetration can play a good role in cooling and lubrication.

The current dynamic capillary infiltration method has the disadvantages of short existence of a single capillary, too large capillary, and single driving force, which makes it difficult for the cutting fluid to effectively reach the tool-chip or tool-work interface during the cutting process, and the cooling and lubrication effects are poor. .

SUMMARY OF THE INVENTION

For this reason, the technical problem to be solved by the present invention is to overcome the shortcomings of the dynamic capillary infiltration method adopted in the prior art, such as short existence of a single capillary, excessive capillary size, single driving force, etc., resulting in the cutting fluid being difficult to be effective in the cutting process. Reaching the knife-chip or knife-work interface, the problem of poor cooling and lubrication.

In order to solve the above-mentioned technical problems, the present invention provides a system for assisting the infiltration of cutting fluid into the cutting area, including,

a blade, the rake face or flank face of the blade is provided with nano-texture, and the nano-texture extends in a direction perpendicular to the main cutting edge;

Cutting fluid, the cutting fluid is a water-based cutting fluid with electroosmotic properties;

A magnetic field generating device includes a coil connected to an external power source.

In an embodiment of the present invention, the magnetic field generating device further includes a clamp for clamping the coil, the clamp includes a fixing rod and an adjustment seat, the fixing rod is used for connecting with the tool holder of the machine tool, so The adjusting seat is hinged with the fixing rod, and the adjusting seat is used for carrying the coil and adjusting the position of the coil.

In an embodiment of the present invention, a wire core is further provided in the coil, and the wire core is used to enhance the magnetic field strength generated when the coil is energized.

A kind of preparation method of the blade of the system of the above-mentioned auxiliary cutting fluid infiltrating into the cutting zone, is characterized in that, comprises the following steps:

polishing and cleaning the surface of the blade;

Nanotextures were prepared on the front/flank faces of the inserts near the main cutting edge using a femtosecond laser.

A kind of preparation method of the cutting fluid of the system of the above-mentioned auxiliary cutting fluid infiltrating the cutting zone, is characterized in that, comprises the following steps:

The zwitterionic surfactant containing one cationic group and two anionic groups in the molecule is dissolved in deionized water to prepare a water-based cutting fluid with electroosmotic properties.

A method for assisting cutting fluid to penetrate into a cutting area, using any of the above-mentioned systems for assisting cutting fluid to penetrate into a cutting area to process a workpiece, comprising the following steps:

Step S1: the blade is installed on the tool holder by the cutter bar;

Step S2: the magnetic field generating device is arranged on the tool holder, and when the nano-texture is arranged on the rake face of the blade, the position of the coil is adjusted so that the center of the coil is perpendicular to the rake face, when the nano-texture is arranged on the rake face of the blade When the texture is arranged on the flank of the blade, the position of the coil is adjusted so that the center of the coil is perpendicular to the flank;

Step S3: setting predetermined cutting parameters and coil energization current, turning on the machine tool to process the workpiece, and continuously spraying cutting fluid in the contact area between the blade and the workpiece.

In one embodiment of the present invention, the distance between the center of the coil and the rake face or flank of the blade is 35mm-45mm, and the current when the coil is energized is 1A-6A.

In an embodiment of the present invention, the magnitude of the magnetic field generated by the coil is adjusted by adjusting the magnitude of the output current of the external power supply of the coil.

In an embodiment of the present invention, during the cutting process, the friction between the blade and the workpiece generates a self-excited electric field, and the intensity of the self-excited electric field is adjusted by adjusting the cutting parameters of the machine tool.

In an embodiment of the present invention, when the coil is energized, the magnetic field strength at its middle position is greater than 220 Gs.

The above-mentioned technical scheme of the present invention has the following advantages compared with the prior art:

The system and method for assisting the infiltration of cutting fluid into the cutting zone of the present invention provide nano-capillary channels that can be quantitatively characterized and regulated by nano-texturing of the blade surface, and utilizes the electrokinetic penetration induced by the self-excited electric field of the friction interface in the cutting zone The applied magnetic field at a certain angle to the self-excited electric field acts on the cutting area, and the Lorentz force generated by the interaction of the electric field and the magnetic field is further introduced by adjusting the magnetic field characteristics and the parameters of the nano-texture structure. In addition to the driving force of the traditional cutting fluid penetration mechanism, electroosmotic force and Lorentz force are introduced to solve the problem of efficient penetration of cutting fluid in the nano-scale space of the cutting contact area. The cutting fluid can efficiently penetrate into the tool-chip/tool-worker contact area, and can form an effective lubricating film on the friction interface in the cutting area to slow down the interface friction, thereby resulting in the improvement of cutting performance such as cutting temperature, blade wear, and workpiece surface integrity. Compared with the existing driving method in which cutting fluid penetrates into the cutting contact area, the magnetic field-assisted nanochannel electroosmotic driving method of the present invention has the advantages of low driving energy field strength, high efficiency, strong controllability, and simple structure.

Description of drawings

In order to make the content of the present invention easier to understand clearly, the present invention will be described in further detail below according to specific embodiments of the present invention and in conjunction with the accompanying drawings, wherein

Fig. 1 is the schematic diagram of the overall structure of the system (the nano-texture is arranged on the rake face) of the auxiliary cutting fluid infiltrating the cutting zone according to the preferred embodiment of the present invention;

2 is a schematic diagram of the overall structure of the system (the nano-texture is arranged on the flank surface) of the auxiliary cutting fluid infiltrating the cutting zone according to the preferred embodiment of the present invention;

Fig. 3 is a schematic diagram of the infiltration of cutting fluid at the cutter-chip interface under the combined action of the external magnetic field and the self-excited electric field of the auxiliary cutting fluid infiltration system shown in Fig. 1;

Fig. 4 is a schematic diagram of the infiltration of cutting fluid at the tool-work interface under the combined action of the external magnetic field and the self-excited electric field of the auxiliary cutting fluid infiltration system shown in Fig. 1;

Fig. 5 is the schematic diagram that the nano-texture of the system in which the auxiliary cutting fluid penetrates into the cutting zone shown in Fig. 1 is arranged on the rake face of the blade;

Fig. 6 is the schematic diagram that the nano-texture of the system in which the auxiliary cutting fluid penetrates into the cutting zone shown in Fig. 1 is arranged on the flank surface of the blade;

Fig. 7 is a schematic diagram of the state of the rake face of the blade when the system shown in Fig. 1 with the auxiliary cutting fluid infiltrating into the cutting area adopts a non-nano-textured blade to cut under an external magnetic field, wherein Fig. a is the SEM image of the worn area, and Fig. b is the Na element Composition analysis chart;

Figure 8 is a schematic diagram of the state of the rake face of the blade when the system shown in Figure 1 with the auxiliary cutting fluid infiltrating into the cutting area uses a nano-textured blade for cutting without an external magnetic field, wherein Figure c is the SEM image of the worn area, and Figure d is the Na element composition diagram;

Figure 9 is a schematic diagram of the state of the rake face of the blade when the system shown in Figure 1 with the auxiliary cutting fluid infiltrating into the cutting area uses a nano-textured blade for cutting under an external magnetic field, wherein Figure e is the SEM image of the worn area, and Figure f is the Na element composition diagram;

Figure 10 is a schematic diagram of friction plasma emission;

Fig. 11 is the topography schematic diagram of the nanotexture of the blade surface processed by femtosecond laser;

Fig. 12 is the structural schematic diagram of the nano-textured capillary of the blade surface processing step by step enlarged;

Figure 13 is a step-by-step enlarged schematic view of the overall structure of the nanotexture machined on the blade surface.

Description of the reference numerals in the description: 1. Blade; 11. Nanotexture; 2. Magnetic field generating device; 21, Coil; 22, Clamp; 221, Fixing rod;

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

Example 1

1-6, a system for assisting the penetration of cutting fluid into the cutting area of the present invention includes,

Blade 1, a nano-texture 11 is provided on the rake face or flank face of the blade 1, and the nano-texture 11 extends in a direction perpendicular to the main cutting edge;

Cutting fluid, the cutting fluid is a water-based cutting fluid with electroosmotic properties;

The magnetic field generating device 2 includes a coil 21 to which an external power source is connected.

Further, the magnetic field generating device 2 further includes a clamp 22 for clamping the coil 21 , the clamp 22 includes a fixing rod 221 and an adjusting base 222 , the fixing rod 221 is used for connecting with the tool rest of the machine tool, and the adjusting base 222 is hinged with the fixing rod 221 , the adjustment seat 222 is used to carry the coil 21 and adjust the position of the coil 21 .

Further, the coil 21 is also provided with a wire core, and the wire core is used to enhance the magnetic field strength generated when the coil 21 is energized.

A kind of preparation method of the blade of the system of the above-mentioned auxiliary cutting fluid infiltrating into the cutting zone, is characterized in that, comprises the following steps:

Grinding and polishing the surface of the blade 1, and cleaning it with ultrasonic waves in an ethanol solution;

Using the objective lens, the linearly polarized femtosecond laser is focused on the front/flank face of the blade 1 near the main cutting edge to process the nanotexture 11, wherein the energy of the femtosecond laser is 0.5μJ-3μJ, and the frequency is 500Hz-1000Hz , the scan times are 1-2 times.

Specifically, nano-textures 11 (ie, nano-channels) perpendicular to the main cutting edge are provided on the rake face or flank face of the blade 1 by using a femtosecond laser to provide capillaries. It is conceivable that the cutting fluid can form a good capillary penetration between the tool-chip interface or the tool-work interface, which can play a better cooling and lubricating effect. Therefore, a nano-texture 11 is arranged on the rake face or flank face of the blade 1. During the cutting process, the cutting fluid passes through the air flow field and reaches the boundary of the cutter-chip or cutter-work interface, and then penetrates through the capillary, flows in the tube, and is heated and vaporized. , and finally adsorb to form a boundary film, which can play a good role in cooling and lubrication.

A kind of preparation method of the cutting fluid of the system of the above-mentioned auxiliary cutting fluid infiltrating the cutting zone, is characterized in that, comprises the following steps:

A zwitterionic surfactant containing one cationic group and two anionic groups in the molecule is dissolved in deionized water to prepare a water-based cutting fluid with electroosmotic properties, and the concentration of the water-based cutting fluid is 0.05mmol/L -0.2mmol/L. Water-based cutting fluid can be prepared by dissolving disodium lauroiminodipropionate in deionized water.

A method for assisting cutting fluid to penetrate into a cutting area, using any of the above-mentioned systems for assisting cutting fluid to penetrate into a cutting area to process a workpiece, comprising the following steps:

Step S1: the blade 1 is horizontally installed on the tool holder through the tool holder;

Step S2: the magnetic field generating device 2 is arranged on the tool holder, and when the nano-texture 11 is arranged on the rake face of the blade 1, the position of the coil 21 is adjusted by the fixture 22, so that the center of the coil 21 is perpendicular to the rake face. , when the nano-texture 11 is arranged on the flank surface of the blade 1, the position of the coil 21 is adjusted by the fixture 22, so that the center of the coil 21 is vertically facing the flank surface;

Specifically, when the nano-texture 11 is set on the rake face of the blade 1, the coil 21 is set above the blade 1 through the fixture 22 and the position of the coil 21 is adjusted so that the center of the coil 21 is perpendicular to the rake face; 21 After power-on, it can generate a first applied magnetic field that is vertically downward and perpendicular to the rake face; during the cutting process, the blade 1 and the workpiece are violently rubbed to generate a self-excited electric field, in which the direction of the workpiece points to the direction of the blade 1 and the main cutting. The electric field component parallel to the edges and the first applied magnetic field work together to generate the Lorentz force that drives the cutting fluid to flow along the nanotexture 11 to the tool-chip contact area, ensuring the effective penetration of the cutting fluid and improving the lubrication and cooling effects.

Specifically, when the nano-texture 11 is arranged on the flank surface of the blade 1, the coil 21 is arranged on the side away from the flank surface of the blade 1 through the fixture 22 and the position of the coil 21 is adjusted so that the center of the coil 21 is vertically oriented Flank; after the coil 21 is energized, a second external magnetic field perpendicular to the flank can be generated; during the cutting process, the blade 1 and the workpiece are violently rubbed to generate a self-excited electric field, in which the direction of the workpiece points to the direction of the blade 1 and the main cutting The edge-parallel electric field component and the second external magnetic field work together to generate the Lorentz force that drives the cutting fluid to flow along the nanotexture 11 to the cutter-worker contact area, ensuring effective infiltration of the cutting fluid and improving lubrication and cooling effects.

Step S3: setting predetermined cutting parameters and coil energization current, turning on the machine tool to process the workpiece, and continuously spraying cutting fluid in the contact area between the blade 1 and the workpiece.

Referring to Figures 10-13, it is conceivable that during the cutting process, capillaries are formed by the micro-roughness sliding and ploughing between the knife-chip or knife-work interface, and the frictional static electricity generated by severe friction at the same time. The potential acts on the escaping low-energy electrons in the capillary channel, and forms a frictional microplasma through electron avalanche, and finally a self-excited electric field can be formed in the interface microscopic contact area. Electrokinetic osmotic behavior of lubricating fluid; however, the capillary formed above has dynamic characteristics, and there are disadvantages such as short existence time of a single capillary and too large capillary size, and the capillary electroosmotic flow driven by an electric field often requires a large electric field strength. When the self-excited electric field is small, the generated electroosmotic force is not enough to overcome the viscous resistance and inertial force, which will lead to the inability to generate electro-osmotic penetration and the poor cooling and lubrication effect of the cutting fluid.

According to electromagnetic fluid mechanics, the motion of the fluid with high conductivity will be significantly affected by the magnetic field, and the combined action of the electric field and the magnetic field can generate a Lorentz force, which can change the boundary layer structure driven only by the electroosmotic force; 1 The surface is nanotextured to form nanocapillary channels that can be quantitatively characterized and regulated, and the electrokinetic penetration effect caused by the self-excited electric field of the friction interface in the cutting area is used to act on the cutting area with an external magnetic field at a certain angle to the self-excited electric field. Magnetic field characteristics, nano-texture structure and other parameters, further introduce the Lorentz force generated by the interaction of electric field and magnetic field to act on the cutting fluid, drive the cutting fluid to effectively penetrate into the tool-worker contact area through the nano-texture 11, and rub the interface in the cutting area. An effective lubricating film is formed to slow down the interface friction, so as to improve the cutting performance such as cutting temperature, wear of the blade 1, and surface integrity of the workpiece. Compared with the existing driving methods for the infiltration of cutting fluid into the cutting contact area, the magnetic field-assisted nanochannel electroosmotic driving method has the advantages of low driving energy field strength, high efficiency, strong controllability, and simple structure.

Further, the distance between the center of the coil 21 and the rake face or the flank face of the blade 1 is 35mm-45mm, and the current when the coil 21 is energized is 1A-6A.

Further, the magnitude of the magnetic field generated by the coil 21 is adjusted by adjusting the magnitude of the output current of the external power supply of the coil 21 .

Further, during the cutting process, the friction between the blade 1 and the workpiece generates a self-excited electric field, and the intensity of the self-excited electric field is adjusted by adjusting the cutting parameters of the machine tool. Specifically, the intensity of the generated self-excited electric field is adjusted by adjusting the feed amount, the cutting amount and the rotational speed of the blade 1 during cutting.

Further, when the coil 21 is energized, the magnetic field strength at its middle position is greater than 220 Gs.

Embodiment 2

Referring to Figures 1-6, on the basis of Embodiment 1, a system for infiltrating auxiliary cutting fluid into the cutting area suitable for processing engineering ceramic workpieces is disclosed,

Specifically, the blade 1 adopts a single crystal diamond blade, and the nano-texture 11 is processed on the flank of the blade 1. The specific steps are as follows:

(1) Grinding and polishing the surface of the single crystal diamond blade, and cleaning it with ultrasonic waves in an ethanol solution for 20 minutes;

(2) Based on the interference model between the surface plasmon wave and the main beam, a linearly polarized femtosecond laser with a wavelength of 800 nm was focused on the flank face of the blade 1 close to the main cutting edge using an objective lens with a numerical aperture of 0.8 (magnification of 80 times). At , the nano-texture 11 is processed. The processing parameters of the laser are as follows: the femtosecond pulse energy is 2 μJ, the frequency is 800 Hz, the number of scans is 1 time, and the nano-texture 11 extends in the direction perpendicular to the main cutting edge. 11 has a depth of 150 nm and a period of 500 nm.

Specifically, a water-based cutting fluid with a concentration of 0.15 mmol/L was used to participate in the cutting process.

Specifically, the parameters of the coil 21 used by the magnetic field generating device 2 are as follows: the outer diameter is 42 mm, the inner diameter is 12 mm, the length is 60 mm, the number of turns is 2000, and the wire diameter is 0.5 mm, and a coil 21 is placed in the coil 21 with a diameter of 12 mm and a length of 20 mm. the iron core to enhance the magnetic field strength generated when the coil 21 is energized;

The position of the coil 21 is adjusted by the fixture 22, and the orientation of the coil 21 is adjusted so that the center of the coil 21 is aligned with the knife-tool contact area of the blade 1 provided with the nanotexture 11, and the center of the coil 21 is 45 mm away from the knife tip. Subsequently, the first and last ends of the coil 21 are connected to the positive and negative poles of the DC regulated power supply, and the size of the magnetic field generated by the coil 21 is adjusted by adjusting the output current of the power supply. In this embodiment, the current when the coil 21 is energized is 1A, At this time, the strength of the magnetic field generated by the middle position of the energized coil 21 can reach 502Gs.

Using the above system to process engineering ceramic workpieces,

Specifically, install the blade 1, align the cutting fluid nozzle at the knife-worker contact area, and then turn on the machine tool to cut the ZrO ₂ engineering ceramic bar. The cutting parameters are: spindle speed 1000r/min, feed rate 10mm/min, The cutting depth is 10μm. Under this cutting parameter, the diamond blade can emit electrons with an energy of up to 900eV when rubbing the ceramic material, and then an electric field of up to 1000V/cm can be formed in the micron-scale region of the tool-work interface; the external energy generated when the coil 21 is energized The magnetic field interacts with the self-excited electric field at the knife-worker friction interface to generate the Lorentz force, which together with the electroosmotic force drives the cutting fluid to penetrate into the cutter-worker contact area through the nanotexture.

Embodiment 3

Referring to FIG. 1 , on the basis of the first embodiment, a system for the infiltration of auxiliary cutting fluid into the cutting area for processing AISI 316L stainless steel workpieces is disclosed,

Specifically, the blade 1 adopts a TiAlN coated blade, and the nano-texture 11 is processed on the rake face of the blade 1. The specific steps are as follows:

(1) grinding and polishing the surface of the TiAlN coated blade, and cleaning it with ultrasonic waves in an ethanol solution for 20 min;

(2) Based on the interference model between the surface plasmon wave and the main beam, a linearly polarized femtosecond laser with a wavelength of 800 nm was focused on the rake face of the insert 1 near the main cutting edge using an objective lens with a numerical aperture of 0.8 (magnification of 80 times). At , the nano-texture 11 is processed. The processing parameters of the laser are as follows: the femtosecond pulse energy is 2.5 μJ, the frequency is 1000 Hz, and the number of scans is 1 time; the nano-texture 11 extends in the direction perpendicular to the main cutting edge, and the nano-texture The structure 11 has a depth of 200 nm and a period of 400 nm.

Specifically, a water-based cutting fluid with a concentration of 0.20 mmol/L was used to participate in the cutting process.

Specifically, the parameters of the coil 21 used by the magnetic field generating device 2 are as follows: the outer diameter is 45mm, the inner diameter is 15mm, the length is 55mm, the number of turns is 1500, and the wire diameter is 1mm, and a coil 21 with a diameter of 15mm and a length of 25mm is placed in the coil 21. Iron core to enhance the magnetic field strength generated when the coil 21 is energized;

The position of the coil 21 is adjusted by the fixture 22, and the orientation of the coil 21 is adjusted at the same time, so that the center of the coil 21 is aligned with the knife-chip contact area of the blade 1 provided with the nanotexture 11, and the center of the coil 21 is 55 mm away from the tool tip. Subsequently, the head and tail ends of the coil 21 are connected to the positive and negative poles of the DC regulated power supply, and the size of the magnetic field generated by the coil 21 is adjusted by adjusting the output current of the power supply. In this embodiment, the current when the coil 21 is energized is 5A, At this time, the intensity of the magnetic field generated by the middle position of the energized coil 21 can reach 1054Gs.

Using the above system to process engineering ceramic workpieces,

Specifically, install the blade, align the cutting fluid nozzle with the tool-chip contact area, and then turn on the machine tool to cut the AISI 316L stainless steel bar. The cutting parameters are: cutting speed 75m/min, feed rate 0.1mm/rev, cutting With a depth of 0.3mm, under this cutting parameter, the TiAlN-coated blade can emit electrons with an energy of up to 1500eV when rubbing the stainless steel material, and then an electric field of up to 1750V/cm can be formed in the micron-scale area of the tool-chip interface; The external magnetic field interacts with the self-excited electric field of the tool-chip friction interface to generate Lorentz force, and together with the electroosmotic force, the cutting fluid is driven to penetrate into the tool-chip contact area through the nanotexture 11.

7(a) and (b) show the SEM images of the wear area of the rake face of the blade 1 and the corresponding Na elemental composition analysis when the blade 1 without nanotexture 11 is used for cutting under an external magnetic field. It can be seen that the rake face of the blade 1 is severely worn, and there is a lot of peeling of the TiAlN coating in the worn area and in the direction of chip flow. It can be seen from the EDS surface distribution diagram of Na element that there is a very small amount of Na element on the rake face of insert 1, while the material of insert 1 and the workpiece material itself do not contain Na element, only cutting fluid (laury iminodipropylene Disodium acid contains Na element. Therefore, the existence of Na element can prove the existence of cutting fluid. In addition, the presence of Na element was hardly detected in the worn area, indicating that almost no cutting fluid penetrated into the knife-chip contact area of the nano-textured insert even under MLM conditions.

8(c) and (d) show the SEM images of the worn area of the rake face of the insert 1 and the corresponding Na elemental composition analysis when the insert 1 with the nano-texture 11 is used for cutting without an external magnetic field. It can be seen that the adhesion phenomenon of stainless steel material also exists in the wear area of the rake face, and there is a certain area of coating peeling phenomenon in the contact area between the knife and the chip. From the EDS surface distribution of Na element, it can be seen that a small amount of lubricant can penetrate into the tool-chip contact area, which is because the nanotexture 11 can provide capillaries in the process of the cutting fluid infiltrating into the tool-chip interface. , so as to promote the infiltration of cutting fluid to a certain extent.

9(e) and (f) show the SEM images of the wear area of the rake face of the insert 1 and the corresponding Na elemental composition analysis when the insert 1 with the nano-texture 11 is used for cutting under an external magnetic field. It can be seen that the rake face of the insert 1 is slightly worn, and there is a very small area of coating peeling in the tool-chip contact area. And from the EDS surface distribution of Na element, it can be seen that a large amount of lubricant can penetrate into the tool-chip contact area under the action of an external magnetic field. This is because when the external magnetic field perpendicular to the self-excited electric field acts on the cutting zone, the Lorentz force generated by the interaction of the electric field and the magnetic field can be further introduced. Under the combined driving of the electroosmotic force and the Lorentz force, the cutting The fluid can efficiently permeate flow within the nanochannels, thereby promoting the formation of a lubricating film at the knife-chip interface.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, other different forms of changes or modifications can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. A system for assisting in the penetration of cutting fluid into a cutting zone, comprising,

a blade having a nanotexture disposed on a rake face or a flank face thereof, the nanotexture extending in a direction perpendicular to a main cutting edge;

the cutting fluid is a water-based cutting fluid with electroosmosis property;

a magnetic field generating device comprising a coil connected to an external power source.

2. The system for assisting in the penetration of cutting fluid into a cutting zone of claim 1, wherein: the magnetic field generating device further comprises a clamp used for clamping the coil, the clamp comprises a fixing rod and an adjusting seat, the fixing rod is used for being connected with a tool rest of a machine tool, the adjusting seat is hinged to the fixing rod, and the adjusting seat is used for bearing the coil and adjusting the position of the coil.

3. The system for assisting in the penetration of cutting fluid into a cutting zone of claim 1, wherein: the coil is also provided with a wire core, and the wire core is used for enhancing the magnetic field intensity generated when the coil is electrified.

4. A method for preparing the insert of the system for assisting the penetration of cutting fluid into a cutting zone according to claim 1, comprising the steps of:

grinding, polishing and cleaning the surface of the blade;

and preparing nano-texture on the front/back tool face of the blade close to the main cutting edge by using femtosecond laser.

5. A method for preparing a cutting fluid for a system for assisting the penetration of a cutting fluid into a cutting zone according to claim 1, comprising the steps of:

the zwitterionic surfactant containing a cationic group and two anionic groups in the molecule is dissolved in deionized water to prepare the water-based cutting fluid with electroosmosis property.

6. A method for penetrating an auxiliary cutting fluid into a cutting area, which is used for processing a workpiece by using the system for penetrating an auxiliary cutting fluid into a cutting area as claimed in any one of claims 1 to 5, and is characterized in that: comprises the following steps of (a) preparing a solution,

step S1, mounting the blade on a knife rest through a knife bar;

step S2, arranging the magnetic field generating device on the tool rest, adjusting the position of the coil to enable the center of the coil to vertically face the front tool face when the nano-texture is arranged on the front tool face of the blade, and adjusting the position of the coil to enable the center of the coil to vertically face the rear tool face when the nano-texture is arranged on the rear tool face of the blade;

and step S3, setting preset cutting parameters and coil electrifying current, starting the machine tool to process the workpiece and continuously spraying cutting fluid on the contact area of the blade and the workpiece.

7. The method for infiltration of an auxiliary cutting fluid into a cutting zone of claim 6, wherein: the distance between the center of the coil and the front tool face or the rear tool face of the blade is 35mm-45mm, and the current of the coil is 1A-6A when the coil is electrified.

8. The method for infiltration of an auxiliary cutting fluid into a cutting zone of claim 6, wherein: the size of the magnetic field generated by the coil is adjusted by adjusting the size of the current output by the coil external power supply.

9. The method for infiltration of an auxiliary cutting fluid into a cutting zone of claim 6, wherein: and in the cutting process, the blade and the workpiece rub to generate a self-excitation electric field, and the intensity of the self-excitation electric field is adjusted by adjusting the cutting parameters of the machine tool.

10. The method for infiltration of an auxiliary cutting fluid into a cutting zone of claim 6, wherein: and the magnetic field intensity of the middle position of the coil is more than 220Gs when the coil is electrified.

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