CN115647450A - Milling cutter based on laser refrigeration, milling equipment and temperature control method - Google Patents

Abstract

The invention discloses a milling cutter based on laser refrigeration, milling equipment and a temperature control method; the milling cutter comprises a disc-type milling cutter and a laser refrigeration module. The laser refrigeration module comprises a refrigeration assembly. And each cutter tooth of the disc-type milling cutter is provided with a refrigerating assembly. The refrigeration assembly includes a planar mirror, a refrigeration element, and a concave mirror. The reflecting surfaces of the plane reflecting mirror and the concave reflecting mirror are opposite to each other and arranged at intervals. A refrigerating inner cavity is formed between the concave reflecting mirror and the plane reflecting mirror. The refrigeration element is disposed in the refrigeration cavity. The plane reflector is provided with a through hole. The through hole on the plane reflector is staggered with the main optical axis of the concave reflector. The lateral part of the refrigeration element is provided with a plurality of light-transmitting windows. According to the invention, the plane reflector and the concave reflector are respectively arranged on two sides of the refrigeration element, so that the path length of the refrigeration element passing through the refrigeration element is increased, and the refrigeration efficiency of the milling cutter is improved.

Description

Milling cutter based on laser refrigeration, milling equipment and temperature control method

Technical Field

The invention belongs to the technical field of cutter cooling, and particularly relates to a milling cutter based on laser refrigeration, milling equipment and a temperature control method.

Technical Field

In the mechanical processing process of the polymer and the biological material, the workpiece is extruded by the cutter to deform, friction occurs between the workpiece and the cutter, a large amount of cutting heat can be generated in the process, if the cutting heat is discharged out in time, the polymer can be melted after being heated, so that thermal deformation is caused, the biological structure tissue in the biological material is damaged, the cutter can be thermally worn, the service life of the cutter is shortened, the processing precision is reduced, and the processing efficiency is greatly limited. Currently, in cutting machining, the machining area is cooled mainly by means of external cooling, for example, cutting fluid is added to the cutting area or low-temperature gas is sprayed into the cutting area. However, the processing of ultra-clean parts such as chip semiconductors and the like has extremely high requirements on the environment, impurities are not allowed to enter a processing area, a large amount of physiological saline is needed for pouring in the cutting of biological materials, great waste is caused, and the cost is increased by an expensive cooling liquid circulation system. Tool cooling in machining presents a significant challenge.

The temperature control of the cutting edge during processing plays an extremely important role, and laser refrigeration reduces the thermal motion of atoms in a substance of a specific material by irradiating the substance with laser with a specific wavelength, thereby reducing the temperature of the substance. The laser refrigerating device is a clean and efficient cooling mode, has a wide application prospect, and is less in research on the application of laser refrigeration to cutting machining tools at present. Patent numbers: in CN212665839U, laser irradiation is used to irradiate yttrium lithium fluoride crystal or glass to realize single point cooling of the grinding wheel cutting area. According to the method, the laser is transmitted through the air, and complex particles in the air can have unknown influence on the laser, so that the cooling effect is influenced; in addition, the invention only aims at the single-point cooling of the grinding wheel cutting area, and the external refrigeration effect is poor; and there is no specific solution for controlling the temperature.

Disclosure of Invention

The invention aims to provide a milling cutter based on laser refrigeration, milling equipment and a temperature control method, so that self-refrigeration and temperature control of the cutter in the cutting process are realized.

In a first aspect, the present invention provides a laser-cooled milling tool, which includes a disc cutter and a laser-cooled module. The laser refrigeration module comprises a refrigeration component. And each cutter tooth of the disc-type milling cutter is provided with a refrigerating assembly. The refrigeration component comprises a plane reflector, a refrigeration element and a concave reflector. The refrigerating element is made of laser refrigerating materials. The reflecting surfaces of the plane reflecting mirror and the concave reflecting mirror are opposite to each other and arranged at intervals. A refrigerating inner cavity is formed between the concave reflecting mirror and the plane reflecting mirror. The refrigeration element is arranged in the refrigeration inner cavity. The plane reflector is provided with a through hole. The through hole on the plane reflector is staggered with the main optical axis of the concave reflector. The lateral part of the refrigeration element is provided with a plurality of light-transmitting windows. In the working process, laser is input into the refrigerating inner cavity from the through hole on the plane reflecting mirror and is reflected back and forth between the plane reflecting mirror and the concave reflecting mirror.

Preferably, the laser refrigeration module further comprises an optoelectronic slip ring, an optoelectronic hybrid cable and a reflector plate. The reflecting mirror is fixed on the side of the plane reflecting mirror far away from the concave reflecting mirror. The reflecting surface of the reflecting mirror inclines towards the central axis of the disc-type milling cutter; one end of the photoelectric hybrid cable is connected with the photoelectric slip ring. The other end of the photoelectric mixed cable is fixed on the disc-type milling cutter, and the light outlet faces to the radial direction of the disc-type milling cutter. The laser emitted from the light outlet of the photoelectric hybrid cable is reflected by the reflecting mirror and then enters the through hole on the plane reflecting mirror. In the working process, externally input laser is emitted into the refrigerating inner cavity through the electric slip ring, the photoelectric mixed cable and the reflecting lens.

Preferably, the laser refrigeration module further comprises a temperature detection assembly. The temperature detection assembly comprises an infrared receiver and an infrared light channel. The infrared light channel is arranged on the side part of the refrigeration assembly. The infrared receiver is arranged at the end part of the infrared light channel and faces to the corresponding cutter tooth. And a signal wire of the infrared receiver is led out through the photoelectric hybrid cable and the photoelectric slip ring.

Preferably, the middle part of the photoelectric hybrid cable protrudes to one side close to the central axis of the disc-type milling cutter.

Preferably, the concave reflecting mirror is a spherical concave mirror.

Preferably, a heat conduction layer is arranged between the concave reflecting mirror and the corresponding knife tooth. The heat conduction layer adopts a flexible heat conduction silica gel sheet.

Preferably, the laser refrigeration material adopts nano cadmium sulfide.

In a second aspect, the invention provides a laser-cooled milling device, which comprises a frame, a workbench, a milling driving mechanism, the milling tool, a clamp, a laser emitter and a control module. The workbench and the milling driving mechanism are both arranged on the frame. The clamp is installed on the workbench. The disc-type milling cutter is arranged on a main shaft of the milling driving mechanism. And a main shaft support used for mounting the main shaft is arranged on the milling driving mechanism. The photoelectric slip ring is arranged between the main shaft support and the main shaft. A signal wire of the infrared receiver is connected to the control module through the photoelectric slip ring; and laser output by the laser emitter is transmitted to each refrigeration component through the input optical fiber and the photoelectric slip ring. The laser transmitter is controlled by the control module.

Preferably, the input optical fiber is an erbium-doped fiber.

In a third aspect, the invention provides a temperature control method for a laser-cooled milling tool in a milling process, which specifically comprises the following steps:

milling a workpiece by using a disc-type milling cutter, wherein the temperature of cutter teeth of the disc-type milling cutter is increased; the laser is injected into the refrigerating inner cavity between the concave reflecting mirror and the plane reflecting mirror and is reflected back and forth between the plane reflecting mirror and the concave reflecting mirror. The refrigerating element is irradiated by the laser to generate anti-Stokes fluorescence, and the anti-Stokes fluorescence is emitted through the light-transmitting window to take away heat, so that the temperature of the cutter teeth is reduced. The infrared receiver detects the intensity of infrared rays radiated by the cutter teeth to obtain the temperature of the cutter teeth; when the measured temperature is greater than the upper limit of the preset range, the laser power is increased and/or the laser wavelength is decreased. When the measured temperature is less than the lower limit of the preset range, the laser power is reduced and/or the laser wavelength is increased.

The invention has the following beneficial effects:

1. the temperature of the cutter head is reduced by irradiating the semiconductor nano material with laser with a specific wavelength to excite anti-Stokes fluorescence; in addition, the planar reflector and the concave reflector are respectively arranged on the two sides of the refrigerating element, so that the path length of the refrigerating element passing through the refrigerating element is increased, and the refrigerating efficiency of the milling cutter is improved; thereby providing a high-efficiency, vibration-free, clean and pollution-free cutter cooling mode.

2. The side surface of the refrigerating inner cavity is provided with the light-transmitting window, so that the anti-stokes fluorescence with heat can be taken away from the inside of the cutter under the condition of not influencing the cutting intensity of the cutter.

3. According to the invention, the infrared ray radiated by each cutter tooth is respectively detected by the infrared receiver, the detection of the temperature of the cutter tooth is realized, the intensity of the refrigeration effect is adjusted by adjusting the laser power and the wavelength, the low delay control of the processing temperature of the milling cutter is realized, the fault of a refrigeration system on a certain cutter tooth can be timely found and eliminated, and the cutter is prevented from generating excessive wear due to unbalanced temperature.

4. The invention adopts II-VI semiconductor nano material cadmium sulfide as laser refrigeration material, which can continuously reduce the temperature through 532nm laser irradiation under the low temperature condition of-173 ℃, and can effectively refrigerate the milling cutter. In addition, the laser is transmitted to the laser refrigeration module through the rare earth element erbium Er < 3+ > -doped gain optical fiber, and the gain optical fiber has stable transmission efficiency and laser gain effect and can increase the refrigeration efficiency.

Drawings

FIG. 1 is a schematic view of the present invention.

Fig. 2 is a schematic view of the installation of the refrigerating assembly and the temperature detecting assembly of the present invention.

FIG. 3 is a flow chart of temperature control according to the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, the milling device based on laser refrigeration comprises a frame, a workbench, a milling driving mechanism, a disc milling cutter 5, a clamp 6, a laser refrigeration module and a control module 10. The workbench and the milling driving mechanism are both arranged on the frame. The clamp 6 is arranged on the workbench and used for clamping workpieces. The disc cutter 5 is mounted on a spindle of a milling drive mechanism, which is capable of rotation and movement under the drive of the milling drive mechanism. And a main shaft support 7 for mounting a main shaft is arranged on the milling driving mechanism.

The laser refrigeration module comprises an optical fiber connector 1, a photoelectric slip ring 2, an input optical fiber 3, a photoelectric mixed cable 4, a laser transmitter 9, a refrigeration component and a temperature detection component. The input optical fiber 3 is an erbium-doped fiber. The optical fiber connector 1 is fixed on the spindle support 7. The fixing part of the photoelectric slip ring 2 is fixed with the main shaft support 7. The rotating part of the photoelectric slip ring 2 is fixed with the main shaft. The fixed part of the photoelectric slip ring 2 is provided with a light inlet, and the rotating part is provided with n light outlets. n is the number of cutter teeth 19 of the disc-type milling cutter 5; all light outlets on the photoelectric slip ring 2 are communicated with the light inlet. The light inlet of the photoelectric slip ring 2 is connected with the laser output interface of the laser transmitter 9 through the optical fiber joint 1 and the input optical fiber 3. The control module 10 includes a controller and a laser signal generator. The signal output interface of the laser signal generator is connected with the control interface of the laser transmitter 9. The controller adjusts the laser intensity and wavelength output by the laser transmitter 9 through the laser signal generator.

As shown in fig. 2, a cooling assembly and a temperature detection assembly are mounted on the top of each cutter tooth 19 of the disc cutter 5. The n refrigeration components are respectively connected with the n light outlets of the photoelectric slip ring 2 through the optical transmission core wires of the n photoelectric hybrid cables 4. The refrigerating assembly comprises a laser emitting hole 11, a reflector plate 13, a plane reflector 15, a refrigerating element 16, a light transmitting window 17, a heat conducting layer 18, cutter teeth 19 and a concave reflector 20.

The cooling element 16 is made of a laser cooling material which can emit fluorescence and reduce the temperature when irradiated with laser light having a specific emission wavelength. The heat conducting layer 18 is made of flexible heat conducting silica gel sheet. The laser refrigerating material is semiconductor nano material cadmium sulfide. In this embodiment, the semiconductor nano-material cadmium sulfide is specifically a II-VI group semiconductor nano-cadmium sulfide material, and the emission wavelength thereof is 500 to 550nm.

The concave reflecting mirror 20 adopts a spherical concave mirror; the rear surface of the concave reflector 20 and the top surface of the corresponding cutter tooth 19 of the disc cutter 5 are fixed by the heat conductive layer 18. The concave reflecting surface of the concave reflecting mirror 20 faces directly upward. A flat mirror 15 having a reflecting surface facing downward is fixed to the disc cutter 5 and positioned directly above the concave mirror 20. A refrigerated cavity is formed between the concave reflector 20 and the flat reflector 15. A cooling element 16 is disposed in the cooling cavity. The middle part of the plane reflector 15 is provided with a through hole. The through hole on the plane mirror 15 is staggered from the main optical axis of the concave mirror 20, so that the laser beam incident from the through hole on the plane mirror 15 is not directly emitted from the through hole on the plane mirror 15 after the primary reflection of the concave mirror 20. The side of the cooling element 16 is provided with one or more light-transmitting windows 17 without affecting the cutting strength of the cutter teeth. The light-transmitting window 17 is used for releasing fluorescence generated by the cooling element 16 under laser irradiation, thereby releasing heat.

And the optical fiber connecting block made of transparent material is fixed on the top surface of the plane reflector. The mirror 13 is arranged inside the fibre optic connection block. The reflecting surface of the reflecting mirror 13 inclines towards the disc-type milling cutter 5 and forms an included angle of 45 degrees with the horizontal plane; the photoelectric hybrid cable 4 is fixed with the corresponding optical fiber connecting block, and the light outlet hole 10 is arranged along the radial direction of the disc-type milling cutter 5 and faces the reflecting surface of the reflector 13. The laser light emitted from the light exit hole 10 of the hybrid optical/electrical cable 4 is reflected by the mirror 13 and enters the through hole of the plane mirror 15. The laser light reflected off the mirror 13 is parallel to the principal optical axis of the concave mirror 20.

The input end of the photoelectric hybrid cable 4 is vertically arranged upwards, the output end of the photoelectric hybrid cable is arranged outwards along the radial direction of the disc-type milling cutter, and the middle part of the photoelectric hybrid cable is protruded to one side close to the central axis of the disc-type milling cutter. In the process of high-speed rotation of the disc-type milling cutter, the photoelectric mixed cable 4 protruding to the inner side can offset the influence of centrifugal action by utilizing the elasticity of the photoelectric mixed cable, and the stability of the laser refrigeration module is improved.

In the working process, laser emitted by the laser emitting head 9 enters the refrigerating inner cavity through the input optical fiber 3, the optical fiber connector 1, the photoelectric slip ring 2, the photoelectric mixed cable 4 and the reflecting lens. The incident laser light (solid line portion) entering the cooling cavity passes through the cooling element. The refrigerating element can generate a refrigerating effect after being irradiated by laser; the laser light is reflected multiple times (in dotted lines) between the flat/concave mirror combinations in the cooling chamber to enhance cooling efficiency. The anti-stokes fluorescence generated by the laser irradiation of the refrigerating element is emitted out through the light-transmitting window 17 to take away heat, so that the refrigerating effect on the cutter teeth is realized.

The temperature sensing assembly includes an infrared receiver 12 and an infrared light channel 14. An infrared light channel 14 is provided at the side of the cooling assembly. The infrared receiver 12 is fixed to the side of the hybrid optical/electrical cable 4 and aligned with the end of the infrared light channel 14. The infrared receiver 12 faces the cutter tooth 19 through the infrared light channel 14, and collects infrared rays radiated by the cutter tooth 19, so that temperature detection of the cutter tooth 19 is realized. The signal output interface of each infrared receiver 12 is connected to the controller of the control module 10 through the corresponding electrical core wire in the optical-electrical hybrid cable 4, the electrical transmission interface of the optical-electrical slip ring 2 and the temperature signal transmission cable 8. The controller obtains the temperature of each cutter tooth according to the electric signals output by the infrared receiver 12, so as to adjust the laser wavelength emitted by the laser transmitter.

The specific implementation process of the invention is as follows:

the control module 10 excites laser with the wavelength of 500-550 nm; the laser is emitted by a laser emitter 9 and irradiates the optical fiber joint 1 through the input optical fiber 3; the input optical fiber 3 can stably transmit laser, and meanwhile, due to absorption of a rare earth medium in the input optical fiber 3 in the transmission process of the laser, electrons in the medium are excited to a higher energy level by energy carried by incident light, and a relaxation phenomenon can occur. The electrons jump from the high energy level to the ground state to release energy and emit photons, so that the photon flow is enhanced, and the refrigeration efficiency is improved. The laser beam is emitted from the light exit hole of the hybrid cable, and then, the laser beam is irradiated to the mirror 13, and the incident laser beam is reflected to the cooling element 16. After the cooling element 16 is irradiated with laser light of a specific wavelength, the thermal movement of atoms therein is blocked by photons in the laser light, and the temperature thereof is lowered. When the incident laser irradiates the concave lens 17 at the bottom of the refrigeration element, the incident laser is reflected to the plane mirror 13 above the concave lens, so that the laser irradiation distance is increased by multiple reflections, and the laser refrigeration efficiency is enhanced. At the same time, the cooling element 16 will excite anti-stokes fluorescence smaller than the incident laser wavelength, which is emitted through the light-transmissive window 17 to take away heat. The cold energy generated by the refrigerating element is transferred to the cutter teeth 19 through the heat conduction layer 18, so that the cutter teeth 19 are refrigerated. Meanwhile, the heat conductive layer 18 made of a flexible material can play a role in buffering and protecting the refrigeration element 16 when the cutter teeth 19 perform cutting operation.

The process and conditions for the refrigeration element 16 to produce the refrigeration effect are as follows:

1. absorption of photons and thermal relaxation (absorption of heat) by the cooling element: the laser photons are bound to atoms of the same thermal motion wavelength in the cooling element.

2. The cooling element spontaneously emits fluorescent photons and thermal relaxation (release of heat): the atoms are subjected to energy level transition, the self movement speed is reduced, then photons are emitted in the opposite direction of the atom movement, an impulse in the opposite direction is applied to the atoms, the atom movement speed is further reduced, and the atom thermal movement speed in the refrigerating element is reduced.

3. The refrigerating element absorbs a laser photon with the energy of h v and emits the average energy of h v _f Takes away the h v _f -a thermal energy of hv, wherein hv _f Refrigerating power P per refrigerating cycle process as average energy of fluorescent radiation _cool Comprises the following steps:

wherein, P _abs The power density is absorbed for resonance. λ is the wavelength of the incident light, λ _f Is the reflected fluorescence wavelength, and when the incident light wavelength is greater than the average fluorescence wavelength, i.e. λ > λ _f Then, laser refrigeration can be realized.

The reflected anti-stokes fluorescence is emitted through the light-transmitting window of the cutter so as to take away heat in the refrigerating element.

As shown in fig. 3, the method for controlling the temperature of the milling device based on laser refrigeration during the milling process specifically includes the following steps:

the temperature control process comprises the following steps: as the cutting operation progresses, the cutter tooth 19 generates heat due to frictional squeezing with the workpiece, and the cutter tooth 19 radiates thermal infrared rays, the energy of which is related to the temperature of the cutter tooth 19, and the energy of infrared rays changes at different temperatures.

The preset temperature T0 is input, the preset temperature T0 is used as a temperature reference of the cutter teeth 19, and then the cutting work is started.

As the cutting operation is performed, the cutting heat temperature of the cutter teeth 19 increases, infrared light generated by the cutter teeth irradiates the infrared receiver 12 (dotted line portion) installed at the lower portion of the photoelectric hybrid cable 4 through the light transmitting hole 14, and the infrared receiver 12 converts an optical signal into an electrical signal after receiving the infrared light radiated from the cutter teeth 19.

The opto-electric hybrid cable then transmits the electrical signal to a signal processing module integrated in the control module 10, and the current temperature of the cutter teeth 19 is obtained after the signal processing. When the temperature of the cutter teeth 19 exceeds a preset value within a certain range, the control module starts to regulate the temperature.

When the temperature is too high, the laser power is firstly improved, the laser refrigeration efficiency is enhanced, and the laser wavelength is simultaneously reduced. The increased laser power allows a significant temperature reduction, while the thermal movement speed of the atoms inside the cooling element increases due to the temperature rise of the cooling element, which has a shorter wavelength than before, when the laser wavelength needs to be decreased to excite more fluorescence to lower the temperature.

If the temperature of the cutter teeth is too low, the cutter teeth with lower temperature are easy to generate stress damage in the cutting process, so that the temperature of the cutter teeth is increased by adjusting the control module, only the power of incident laser is reduced, and the temperature of the refrigerating element is slowly increased.

Claims (10)

1. A milling cutter based on laser refrigeration comprises a disc-type milling cutter (5); the method is characterized in that: the device also comprises a laser refrigeration module; the laser refrigeration module comprises a refrigeration assembly; each cutter tooth (19) of the disc-type milling cutter (5) is provided with a refrigeration component; the refrigeration assembly comprises a plane reflector (15), a refrigeration element (16) and a concave reflector (20); the refrigerating element (16) adopts a laser refrigerating material; the reflecting surfaces of the plane reflecting mirror (15) and the concave reflecting mirror (20) are opposite to each other and arranged at intervals; a refrigerating inner cavity is formed between the concave reflector (20) and the plane reflector (15); the refrigerating element (16) is arranged in the refrigerating inner cavity; the plane reflector (15) is provided with a through hole; the through hole on the plane reflector (15) is staggered with the main optical axis of the concave reflector (20); the side part of the refrigerating element (16) is provided with a plurality of light-transmitting windows (17); in the working process, laser is input into the refrigerating inner cavity from the through hole on the plane reflector (15) and is reflected back and forth between the plane reflector (15) and the concave reflector (20).

2. The milling tool based on laser refrigeration as set forth in claim 1, wherein: the laser refrigeration module also comprises a photoelectric slip ring (2), a photoelectric hybrid cable (4) and a reflector (13); the reflecting mirror (13) is fixed on one side of the plane reflecting mirror (15) far away from the concave reflecting mirror (20); the reflecting surface of the reflecting mirror (13) inclines towards the central axis of the disc milling cutter (5); one end of the photoelectric hybrid cable (4) is connected with the photoelectric slip ring (2); the other end of the photoelectric mixed cable (4) is fixed on the disc-type milling cutter (5), and the light emitting hole (10) is arranged along the radial direction of the disc-type milling cutter (5); laser emitted from a light outlet (10) of the photoelectric hybrid cable (4) is reflected by a reflecting lens (13) and then emitted into a through hole on a plane reflector (15); in the working process, externally input laser is emitted into the refrigerating inner cavity through the electric slip ring (2), the photoelectric hybrid cable (4) and the reflecting lens (13).

3. The milling tool based on laser refrigeration as set forth in claim 2, wherein: the laser refrigeration module also comprises a temperature detection assembly; the temperature detection assembly comprises an infrared receiver (12) and an infrared light channel (14); the infrared light channel (14) is arranged on the side part of the refrigeration assembly; the infrared receiver (12) is arranged at the end part of the infrared light channel (14) and faces to the corresponding cutter tooth (19); the signal line of the infrared receiver (12) is led out through the photoelectric hybrid cable (4) and the photoelectric slip ring (2).

4. The milling tool based on laser refrigeration as set forth in claim 1, wherein: the middle part of the photoelectric mixed cable (4) protrudes to one side close to the central axis of the disc-type milling cutter.

5. The milling tool based on laser refrigeration as set forth in claim 1, wherein: the concave reflecting mirror (20) adopts a spherical concave mirror.

6. The milling tool based on laser refrigeration as set forth in claim 1, wherein: a heat conduction layer (18) is arranged between the concave reflecting mirror (20) and the corresponding cutter tooth (19); the heat conduction layer (18) adopts a flexible heat conduction silica gel sheet.

7. The milling tool based on laser refrigeration as set forth in claim 1, wherein: the laser refrigeration material adopts nano cadmium sulfide.

8. A laser refrigeration milling device comprises a frame, a workbench, a milling driving mechanism, a clamp (6) and a control module (10); the method is characterized in that: further comprising a laser emitter (9) and a milling tool according to any of claims 1-7; the workbench and the milling driving mechanism are both arranged on the frame; the clamp (6) is arranged on the workbench; the disc type milling cutter (5) is arranged on a main shaft of the milling driving mechanism; a main shaft support (7) for mounting a main shaft is arranged on the milling driving mechanism; the photoelectric slip ring (2) is arranged between the main shaft support (7) and the main shaft; a signal wire of the infrared receiver (12) is connected to the control module through the photoelectric slip ring (2); laser output by the laser emitter (9) is transmitted to each refrigeration component through the input optical fiber (3) and the photoelectric slip ring (2); the laser emitter (9) is controlled by the control module.

9. The milling equipment based on laser refrigeration as set forth in claim 1, wherein: the input optical fiber (3) adopts an erbium-doped optical fiber.

10. A temperature control method in the milling process is characterized in that: milling a workpiece using the disc cutter (5) in the milling tool according to any one of claims 1 to 7, wherein the temperature of the teeth of the disc cutter (5) is increased; laser is injected into a refrigerating inner cavity between the concave reflecting mirror (20) and the plane reflecting mirror (15) and is reflected back and forth between the plane reflecting mirror (15) and the concave reflecting mirror (20); the refrigerating element emits anti-Stokes fluorescence generated by laser irradiation through the light-transmitting window (17) to take away heat, so that the temperature of the cutter teeth is reduced; the infrared receiver (12) detects the intensity of infrared rays radiated by the cutter teeth to obtain the temperature of the cutter teeth; when the measured temperature is larger than the upper limit of the preset range, the laser power is increased and/or the laser wavelength is reduced; when the measured temperature is less than the lower limit of the preset range, the laser power is reduced and/or the laser wavelength is increased.

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