Grinding Equipment and Processing Method Based on Nitriding after Nanocrystallization of Mold Surface

Abstract

The present invention discloses a grinding device and a processing method based on nitriding after surface nanocrystallization of a mold, relating to the technical field of grinding. It includes a base, on which a lifting table is slidably connected. The base is fixedly connected with a fixed frame, and the base is fixedly connected with a cylinder. The telescopic end of the cylinder is fixedly connected with the lifting table. A carrier frame is movably connected to the fixed frame, and an infrared sensor is fixedly connected to the fixed frame. The infrared sensor faces downward towards the tabletop of the lifting table. The present invention detects the temperature change during grinding through the infrared sensor, and the control system automatically adjusts the length of the cylinder telescopic rod according to the temperature, thereby dynamically adjusting the pressure between the grinding frame and the workpiece. The higher the temperature, the lighter the grinding pressure, so as to accelerate the temperature reduction, and at the same time prevent the deformation or damage of the workpiece caused by high temperature, ensuring the grinding quality.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding, and in particular to a grinding device and a processing method based on surface nanonitriding of a mold. Background Art

[0002] Nitriding treatment on the surface of a mold is a common surface modification technology. By nitriding treatment, a high-hardness nitride layer can be formed on the surface of the mold, significantly improving the surface hardness. At the same time, it can prevent the intrusion of oxygen and moisture, enabling the mold to have higher hardness, wear resistance and corrosion resistance, and significantly extending the service life of the mold and improving the product quality.

[0003] However, in practical applications, these high-hardness surfaces often need to be finely ground to achieve the ideal finish and flatness to ensure their performance in precision machining. For example, the heat generated during grinding needs to be cooled down by a suitable coolant. Otherwise, too high a temperature will cause damage to the nitrided layer on the workpiece surface, resulting in thermal deformation or damage to the mold, affecting the quality of the final product; while too low a temperature may lead to waste of coolant and increase production costs. For example, the grinding pressure needs to be appropriate. Otherwise, at a lower temperature, low-pressure grinding will affect the grinding effect, and at a higher temperature, high-pressure grinding is also likely to cause damage or deformation to the workpiece surface.

[0004] Since the current grinding technology is difficult to make the coolant flow rate and the grinding pressure dynamically adapt to the grinding temperature at the same time, a grinding device and a processing method based on surface nanonitriding of a mold are proposed. Summary of the Invention

[0005] In order to overcome the shortcoming that the current grinding technology is difficult to make the coolant flow rate and the grinding pressure dynamically adapt to the grinding temperature at the same time, the present invention provides a grinding device and a processing method based on surface nanonitriding of a mold.

[0006] The grinding equipment based on nano-nitriding of the mold surface includes a base, the base is slidably connected to a lifting platform, the base is fixedly connected to a fixed frame, the base is fixedly connected to a cylinder, the telescopic end of the cylinder is fixedly connected to the lifting platform, the fixed frame is movably connected to a carrier frame, the fixed frame is fixedly connected to an infrared sensor, the infrared sensor is downwardly facing the table top of the lifting platform, the carrier frame is fixedly connected to a connecting pipe, the carrier frame is rotatably connected to a hollow shaft, the connecting pipe is rotatably connected to the hollow shaft, a grinding frame is slidably connected in the hollow shaft, the grinding frame is located above the lifting platform, and cooling liquid channels are provided in the hollow shaft and the grinding frame, and the The coolant channel of the hollow shaft is connected to the connecting pipe, and a first spring is fixedly connected between the hollow shaft and the grinding frame. At least one Y-shaped hole is opened on the side of the grinding frame close to the coolant channel of the hollow shaft, and the Y-shaped hole is located in the coolant channel of the grinding frame, and the Y-shaped hole moves upward and extends into the coolant channel of the hollow shaft. At this time, the coolant channel of the grinding frame is connected to the coolant channel of the hollow shaft through the Y-shaped hole, and a fixing ring is fixedly connected to the side of the coolant channel of the hollow shaft close to the Y-shaped hole. The fixing ring is used to block the Y-shaped hole, and the supporting frame is provided with a driving assembly for driving the grinding frame to rotate and grind.

[0007] As a preferred technical solution of the present invention, the infrared sensor is electrically connected to the cylinder through a control module.

[0008] As a preferred technical solution of the present invention, the driving assembly includes a first motor, the first motor is fixedly connected to the carrier frame, the output shaft of the first motor is connected to the hollow shaft through a pulley assembly, the connecting pipe is fixedly connected to a contact switch, and the contact switch is electrically connected to the first motor through a control module.

[0009] As a preferred technical solution of the present invention, it also includes a cooling pipe, which is connected to the connecting pipe, and the cooling pipe is wound several times along the outer wall of the first motor. The supporting frame is fixedly connected to the connecting frame, and the cooling pipe is fixedly connected to the connecting frame. The connecting frame is rotatably connected to a retaining ring, and the retaining ring is fixed to the grinding frame through circumferentially distributed blades.

[0010] As a preferred technical solution of the present invention, it also includes two fixed cylinders, the fixed cylinders are connected to the connecting pipe, an adjustment frame is slidably connected between the two fixed cylinders, the adjustment frame moves to contact the contact switch, the adjustment frame is slidably connected to the connecting pipe, a second spring is fixed between the fixed cylinder and the adjustment frame, and a strip-shaped adjustment port is opened on the side of the adjustment frame close to the cooling pipe.

[0011] As a preferred technical solution of the present invention, it further includes a second motor, the second motor is fixedly connected to the fixed frame, the contact switch is electrically connected to the second motor through a control module, a crank is fixedly connected to the output shaft of the second motor, and the crank is rotatably connected to the carrier.

[0012] As a preferred technical solution of the present invention, the rotational speed of the second motor is less than that of the first motor.

[0013] As a preferred technical solution of the present invention, it further includes a rotating ring, the rotating ring is rotatably connected to the lifting table, two guide grooves are formed in the base, the rotating ring is slidably connected to the guide grooves, a circumferentially distributed clamping block is slidably connected to the top of the rotating ring, the rotating ring is provided with circumferentially distributed arc-shaped grooves, the arc-shaped grooves correspond to the clamping blocks one by one, and the rotating ring pushes the clamping blocks to slide along the lifting table through the arc-shaped grooves.

[0014] As a preferred technical solution of the present invention, the upper part of the guide groove is set as a straight groove, and the lower part is set as a curved groove.

[0015] The grinding method based on the surface nanonitriding of the mold includes the following steps:

[0016] S1: Place the mold workpiece to be polished on the lifting table directly below the polishing frame;

[0017] S2: Control the telescopic rod of the cylinder to extend upward until the polishing frame drives the Y-shaped hole to move upward until the upper V-shaped opening is completely blocked by the fixed ring, and only the lower I-shaped opening is communicated with the coolant channel of the hollow shaft;

[0018] S3: Start the first motor and the second motor;

[0019] S4: Turn off the first motor and the second motor, and control the telescopic rod of the cylinder to shorten downward to reset.

[0020] Beneficial effects: 1. The present invention detects the temperature change during grinding through an infrared sensor, and the control system automatically adjusts the length of the telescopic rod of the cylinder according to the temperature, thereby dynamically adjusting the pressure between the polishing frame and the workpiece, so that the higher the temperature, the lighter the polishing pressure, thereby accelerating the temperature reduction, and at the same time preventing the deformation or damage of the workpiece caused by high temperature, and ensuring the grinding quality.

[0021] 2. The present invention can also regulate the caliber of the Y-shaped hole communicating with the cooling channel through the temperature control system, so as to be able to regulate the coolant flow rate in real time according to the temperature, so that the higher the temperature, the greater the coolant flow rate, effectively controlling the temperature rise during the grinding process, and avoiding damage to the workpiece and equipment caused by overheating.

[0022] 3. The present invention drives the grinding frame to rotate self - sufficiently by the first motor to achieve basic grinding. At the same time, the second motor drives the crank to rotate, making the grinding frame rotate reciprocally along an irregular trajectory to achieve fancy grinding, expanding the grinding range, and improving the grinding uniformity and efficiency.

[0023] 4. The coolant of the present invention not only directly acts on the inner periphery of the grinding frame, but also cools down by winding the outer wall of the first motor through the cooling pipe, further protecting key components. At the same time, the coolant is scattered around the grinding frame to expand the cooling range and enhance the overall cooling effect.

[0024] 5. When the coolant passage of the present invention is blocked, the adjustment opening will automatically expand adaptively to reduce the coolant pressure, playing a role of real - time pressure relief protection, avoiding over - pressure caused by the blockage of the coolant passage. And when the blockage degree of the coolant passage is too large and the contact switch is triggered, the system will immediately shut down the first motor and the second motor to stop grinding, realizing the function of emergency shutdown and preventing equipment failures or safety accidents.

[0025] 6. During the lifting process of the lifting platform of the present invention, the rotating ring rotates clockwise through the guidance of the guide groove, and the clamping blocks move towards the middle to clamp the workpiece; during the lowering process, it rotates counterclockwise to loosen the workpiece, simplifying the workpiece clamping and unloading process and shortening the non - processing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three - dimensional structure schematic diagram of the present invention.

[0027] Figure 2 is a partial three - dimensional structure cross - sectional view of the present invention.

[0028] Figure 3 is a three - dimensional structure schematic diagram of components such as the carrier, crank and first motor of the present invention.

[0029] Figure 4 is a three - dimensional structure schematic diagram of components such as the connecting pipe, hollow shaft and grinding frame of the present invention.

[0030] Figure 5 is a three - dimensional structure schematic diagram of components such as the hollow shaft, grinding frame and fixing ring of the present invention.

[0031] Figure 6 is a three - dimensional structure schematic diagram of components such as the connecting pipe, cooling pipe and retaining ring of the present invention.

[0032] Figure 7 is a three - dimensional structure schematic diagram of components such as the cooling pipe, adjustment frame and contact switch of the present invention.

[0033] Figure 8 is a three - dimensional structure schematic diagram of components such as the fixing cylinder, contact switch and second spring of the present invention.

[0034] Figure 9 This is a schematic three-dimensional structure diagram of components such as the lifting platform, rotating ring, and clamping block of the present invention.

[0035] Figure 10 This is a separated three-dimensional structure diagram of the base and the rotating ring of the present invention.

[0036] Among them: 101 - base, 102 - lifting platform, 103 - fixing frame, 104 - cylinder, 105 - bearing frame, 106 - infrared sensor, 107 - first motor, 108 - pulley assembly, 109 - connecting pipe, 110 - hollow shaft, 111 - grinding frame, 112 - first spring, 113 - Y-shaped hole, 114 - fixing ring, 115 - contact switch, 201 - cooling pipe, 202 - retaining ring, 203 - connecting frame, 301 - fixing cylinder, 302 - adjusting frame, 303 - second spring, 304 - adjusting opening, 401 - second motor, 402 - crank, 501 - rotating ring, 502 - guide groove, 503 - clamping block. Detailed implementation manners

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.

[0038] Embodiment 1: A grinding device based on nano-nitriding on the surface of a mold, such as Figures 1-5As shown, it includes a base 101, the middle of the base 101 is connected to a lifting platform 102 in a sliding manner in the up and down direction, a fixing frame 103 is fixedly connected to the right side of the base 101, a cylinder 104 is fixedly connected to the front side of the base 101, the telescopic end of the cylinder 104 is fixedly connected to the lifting platform 102, the upper part of the fixing frame 103 is movably connected to a supporting frame 105, and an infrared sensor 106 is fixedly connected to the middle of the fixing frame 103, and the infrared sensor 106 is downward facing the table surface of the lifting platform 102. The infrared sensor 106 is electrically connected to the cylinder 104 through the control module. The right side of the carrier 105 is fixed with a first motor 107. The top middle of the carrier 105 is fixed with a connecting pipe 109. The connecting pipe 109 is used to input coolant. The middle of the carrier 105 is rotatably connected to a hollow shaft 110. The connecting pipe 109 is rotatably connected to the hollow shaft 110. The output shaft of the first motor 107 is connected to the hollow shaft 110 through a pulley assembly 108. A grinding frame 111 is connected to the shaft 110 in a sliding manner in the up-down direction. The grinding frame 111 is located above the lifting platform 102. Cooling liquid channels are provided in both the hollow shaft 110 and the grinding frame 111. The upper side of the cooling liquid channel of the hollow shaft 110 is connected to the connecting pipe 109. A first spring 112 is fixed between the hollow shaft 110 and the grinding frame 111. Two Y-shaped holes 113 are provided on the upper side of the grinding frame 111. The Y-shaped holes 113 are located in the cooling liquid channel of the grinding frame 111, and the Y The Y-shaped hole 113 moves upward and extends into the coolant channel of the hollow shaft 110. At this time, the coolant channel of the grinding frame 111 is connected to the coolant channel of the hollow shaft 110 through the Y-shaped hole 113. A fixing ring 114 is fixed to the lower side of the coolant channel of the hollow shaft 110. The fixing ring 114 is used to block the Y-shaped hole 113 after moving upward. A contact switch 115 is fixed to the upper part of the connecting tube 109. The contact switch 115 is electrically connected to the first motor 107 through the control module.

[0039] First, place the mold workpiece to be polished on the lifting table 102 directly below the polishing frame 111. Then, manually control the telescopic rod of the air cylinder 104 to extend upward, thereby driving the lifting table 102 to move upward. The lifting table 102 drives the workpiece to move upward. The workpiece contacts the bottom of the polishing frame 111 and continues to press the polishing frame 111, causing the polishing frame 111 to slide upward relative to the hollow shaft 110, and the first spring 112 is compressed until the polishing frame 111 drives the Y-shaped hole 113 to move upward until the V-shaped opening in the upper half is completely blocked by the fixing ring 114, leaving only the I-shaped opening in the lower half communicating with the coolant passage of the hollow shaft 110. Then, start the first motor 107. The output shaft of the first motor 107 drives the hollow shaft 110 to rotate relative to the bearing frame 105 through the pulley assembly 108, thereby driving the polishing frame 111, the first spring 112, and the fixing ring 114 to rotate as a whole, enabling the polishing frame 111 to perform pressing and self-rotating polishing on the top of the workpiece. After polishing, manually touch the contact switch 115 to turn off the first motor 107 and control the telescopic rod of the air cylinder 104 to shorten downward, thereby driving the lifting table 102 to move downward, causing the polished mold workpiece to separate from the polishing frame 111. The reset of the first spring 112 drives the polishing frame 111 to slide downward relative to the hollow shaft 110 until the polishing frame 111 drives the Y-shaped hole 113 to move downward until it is completely blocked by the hollow shaft 110.

[0040] During the above grinding process, the high-speed friction between the grinding frame 111 and the workpiece will cause temperature rise. The higher the temperature, the stronger the infrared radiation. By inputting coolant into the connecting pipe 109, the coolant can flow into the cooling channels of the hollow shaft 110, then flow into the coolant channels of the grinding frame 111 through the I port of the Y-shaped hole 113, and finally flow along the inner periphery of the grinding frame 111 to the workpiece, achieving the effect of cooling while grinding. When the infrared sensor 106 detects that the infrared radiation intensity reaches the lowest preset value, the infrared sensor 106 sends an electrical signal, and the control module receives the electrical signal and controls the telescopic rod of the cylinder 104 to adaptively contract according to the intensity of the infrared radiation (the stronger the infrared radiation, the more it contracts), so that the lifting table 102 adaptively descends, and then the workpiece adaptively descends, and then the first spring 112 adaptively rebounds, causing the grinding frame 111 to descend with the workpiece. The grinding frame 111 drives the V port of the Y-shaped hole 113 to adaptively move downward out of the fixed ring 114, making the coolant flowing into the grinding frame 111 from the hollow shaft 110 increase adaptively. When the temperature gradually decreases, the control module controls the telescopic rod of the cylinder 104 to adaptively extend according to the intensity of the infrared radiation, making the coolant flowing into the grinding frame 111 from the hollow shaft 110 decrease adaptively. In this way, the higher the grinding temperature, the more coolant is added, effectively controlling the temperature rise during the grinding process, avoiding damage to the workpiece and equipment caused by overheating, and achieving the effect that the higher the temperature, the lighter the grinding pressure, making the grinding pressure automatically and dynamically match the grinding temperature, thus accelerating the temperature reduction and preventing workpiece deformation or damage caused by high temperature, ensuring the grinding quality.

[0041] Embodiment 2: On the basis of Embodiment 1, as Figure 6 shown, it further includes a cooling pipe 201. The cooling pipe 201 is communicated with the right side of the connecting pipe 109. The cooling pipe 201 is wound around the outer wall of the first motor 107 for four turns. A connecting frame 203 is fixedly connected to the bottom of the carrier 105. The cooling pipe 201 is fixedly connected to the connecting frame 203. A retaining ring 202 is rotatably connected to the lower part of the connecting frame 203. The retaining ring 202 is fixedly connected to the grinding frame 111 through circumferentially distributed blades.

[0042] Most of the coolant in the input connecting pipe 109 enters the coolant channel of the hollow shaft 110, and a small part can be relieved and diverted into the cooling pipe 201. The cooling pipe 201 is wound around the outer wall of the first motor 107, so that the coolant can cool down the first motor 107 with a relatively high speed. At the same time, the coolant flowing out through the cooling pipe 201 will flow to the blades in the retaining ring 202. Since the outlet end of the cooling pipe 201 and the carrier 105 are fixedly connected by the connecting frame 203, the retaining ring 202 is directly fixedly connected to the grinding frame 111, and the grinding frame 111 rotates relative to the carrier 105, so that the blades in the retaining ring 202 rotate relative to the outlet end of the cooling pipe 201, thereby dispersing the coolant flowing out from the outlet end of the cooling pipe 201 around the grinding frame 111, expanding the range of the coolant, and achieving a better cooling effect and wider coverage.

[0043] Embodiment 3: On the basis of Embodiment 2, as Figure 7 and Figure 8 shown, it further includes two fixed cylinders 301. The fixed cylinders 301 are communicated with the connecting pipe 109. An adjusting frame 302 is slidably connected between the two fixed cylinders 301 in the up and down direction. The adjusting frame 302 moves upward to contact the contact switch 115. The adjusting frame 302 is slidably connected to the connecting pipe 109. A second spring 303 is fixedly connected between the fixed cylinder 301 and the adjusting frame 302. A strip-shaped adjusting opening 304 is opened on one side of the adjusting frame 302 close to the cooling pipe 201.

[0044] When the coolant channel is blocked, the adjusting opening 304 can be enlarged so that more coolant flows into the cooling pipe 201, reducing the pressure of the coolant on the blocked coolant channel. The specific operation is as follows: According to the blockage situation, the hydraulic pressure of the coolant in the connecting pipe 109 will increase adaptively, causing the adjusting frame 302 to move upward adaptively and the second spring 303 to be compressed adaptively, so that the diameter of the adjusting opening 304 communicating with the cooling pipe 201 is enlarged adaptively. In this way, the amount of coolant flowing into the cooling pipe 201 is automatically and dynamically matched with the blockage degree of the coolant channel, achieving the effect of real-time pressure relief for overpressure protection and avoiding overpressure due to the blockage of the coolant channel.

[0045] When the blockage degree of the coolant channel is too large, causing the adjusting frame 302 to trigger the contact switch 115 upward, the contact switch 115 controls the first motor 107 to shut down through the control module, thereby stopping grinding and realizing the function of emergency shutdown to prevent equipment failure or safety accidents.

[0046] Embodiment 4: On the basis of Embodiment 3, as Figures 1-3As shown in the figure, it further includes a second motor 401. The second motor 401 is fixedly connected to the top of the fixed frame 103. The contact switch 115 is electrically connected to the second motor 401 through a control module. The rotation speed of the second motor 401 is less than that of the first motor 107. A crank 402 is fixedly connected to the output shaft of the second motor 401, and the crank 402 is rotatably connected to the top of the carrier 105.

[0047] During the grinding process, the second motor 401 can also be started, so that the output shaft of the second motor 401 drives the crank 402 thereon to rotate. The two cranks 402 jointly drive the carrier 105 to reciprocate and rotate along an irregular trajectory, thereby driving the first motor 107, the pulley assembly 108, the connecting pipe 109, the hollow shaft 110, the grinding frame 111, the first spring 112 and the fixing ring 114 thereon to rotate synchronously as a whole, realizing fancy grinding, expanding the operating range of the grinding frame 111, thereby expanding the grinding range and improving the grinding effect; if the adjusting frame 302 triggers the contact switch 115 upward, the contact switch 115 controls the second motor 401 to turn off through the control module. If the adjusting frame 302 does not trigger the contact switch 115 upward, the second motor 401 is manually turned off.

[0048] As Figure 9 and Figure 10 As shown in the figure, it further includes a rotating ring 501. The rotating ring 501 is rotatably connected to the lifting platform 102. Two guide grooves 502 are formed on the base 101. The upper part of the guide groove 502 is a straight groove, and the lower part is a curved groove. The rotating ring 501 is slidably connected to the guide groove 502. Four circumferentially distributed clamping blocks 503 are slidably connected to the top of the rotating ring 501. The clamping blocks 503 are used to clamp the workpiece. Four circumferentially distributed arc grooves are formed in the rotating ring 501. The arc grooves correspond to the clamping blocks 503 one by one, and the rotating ring 501 pushes the clamping blocks 503 to slide along the lifting platform 102 through the arc grooves.

[0049] When the lifting platform 102 is lifted upward, it drives the rotating ring 501 and the clamping blocks 503 to rise together. During this process, under the guiding action of the guide groove 502, the rotating ring 501 will also rotate clockwise. The rotating ring 501 pushes the clamping blocks 503 to move towards the middle to clamp the workpiece through the arc grooves thereon. In the later stage when the lifting platform 102 descends, the lifting platform 102 pushes the rotating ring 501 to rotate counterclockwise and reset through the lower part of the guiding groove, so that the clamping blocks 503 reset to release the workpiece.

[0050] Embodiment 5: On the basis of Embodiment 4, a grinding method based on nano nitriding of the mold surface includes the following steps:

[0051] S1: Place the mold workpiece to be ground on the lifting platform 102 directly below the grinding frame 111;

[0052] S2: Control the telescopic rod of the air cylinder 104 to extend upward until the grinding frame 111 drives the Y-shaped hole 113 to move upward until the V-shaped opening in the upper half is completely blocked by the fixed ring 114, leaving only the I-shaped opening in the lower half communicating with the coolant channel of the hollow shaft 110;

[0053] S3: Start the first motor 107 and the second motor 401;

[0054] S4: Turn off the first motor 107 and the second motor 401, and control the telescopic rod of the air cylinder 104 to shorten downward and reset.

[0055] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A grinding device based on nitriding after surface nanocrystallization of a mold, characterized in that: The invention comprises a base (101), wherein the base (101) is slidably connected to a lifting platform (102), wherein the base (101) is fixedly connected to a fixing frame (103), wherein the base (101) is fixedly connected to a cylinder (104), wherein the telescopic end of the cylinder (104) is fixedly connected to the lifting platform (102), wherein a supporting frame (105) is movably connected to the fixing frame (103), wherein the fixing frame (103) is fixedly connected to an infrared sensor (106), wherein the infrared sensor (106) is downwardly movable. The supporting frame (105) is fixedly connected to the table surface of the lifting platform (102), the supporting frame (105) is rotatably connected to a hollow shaft (110), the connecting pipe (109) is rotatably connected to the hollow shaft (110), a grinding frame (111) is slidably connected in the hollow shaft (110), the grinding frame (111) is located above the lifting platform (102), and a cooling liquid channel is provided in both the hollow shaft (110) and the grinding frame (111). , and the cooling liquid channel of the hollow shaft (110) is communicated with the connecting pipe (109), a first spring (112) is fixedly connected between the hollow shaft (110) and the grinding frame (111), and at least one Y-shaped hole (113) is opened on one side of the grinding frame (111) close to the cooling liquid channel of the hollow shaft (110), and the Y-shaped hole (113) is located in the cooling liquid channel of the grinding frame (111), and the Y-shaped hole (113) moves upward and extends into the hollow shaft (1 10), at this time, the cooling liquid channel of the grinding frame (111) is connected to the cooling liquid channel of the hollow shaft (110) through the Y-shaped hole (113), and a fixing ring (114) is fixedly connected to the side of the cooling liquid channel of the hollow shaft (110) close to the Y-shaped hole (113), and the fixing ring (114) is used to block the Y-shaped hole (113), and the supporting frame (105) is provided with a driving component for driving the grinding frame (111) to rotate and grind.

2. The grinding equipment based on the nitriding after nano-surfacing of the mold surface according to claim 1, characterized in that: The infrared sensor (106) is electrically connected to the cylinder (104) via a control module.

3. The grinding equipment based on the nitriding after nano-surfacing of the mold surface according to claim 2, characterized in that: The driving assembly includes a first motor (107), the first motor (107) is fixedly connected to the carrier (105), the output shaft of the first motor (107) and the hollow shaft (110) are connected to each other through a pulley assembly (108), the connecting pipe (109) is fixedly connected to a contact switch (115), and the contact switch (115) is electrically connected to the first motor (107) through a control module.

4. The grinding equipment based on the nitriding after nano - surface treatment of the mold surface according to claim 3, wherein: It further includes a cooling pipe (201), the cooling pipe (201) is communicated with the connecting pipe (109), the cooling pipe (201) winds around the outer wall of the first motor (107) for several turns, the bearing frame (105) is fixedly connected with a connecting frame (203), the cooling pipe (201) is fixedly connected with the connecting frame (203), the connecting frame (203) is rotatably connected with a retaining ring (202), and the retaining ring (202) is fixedly connected with the grinding frame (111) through circumferentially distributed blades.

5. The grinding equipment based on nitriding after nano - surface treatment of the mold surface according to claim 4, characterized in that: It further includes two fixed cylinders (301), the fixed cylinders (301) are communicated with the connecting pipe (109), an adjusting frame (302) is slidably connected between the two fixed cylinders (301), the adjusting frame (302) moves to contact the contact switch (115), the adjusting frame (302) is slidably connected with the connecting pipe (109), a second spring (303) is fixedly connected between the fixed cylinder (301) and the adjusting frame (302), and a strip-shaped adjusting opening (304) is formed on one side of the adjusting frame (302) close to the cooling pipe (201).

6. The grinding equipment based on the nitriding after nano - surface treatment of the mold surface as claimed in claim 5, characterized in that: It further includes a second motor (401), the second motor (401) is fixedly connected with the fixed frame (103), the contact switch (115) is electrically connected with the second motor (401) through a control module, an output shaft of the second motor (401) is fixedly connected with a crank (402), and the crank (402) is rotatably connected with the bearing frame (105).

7. The grinding equipment based on the nitriding after the nano-nitriding of the mold surface according to claim 6, characterized in that: The rotation speed of the second motor (401) is less than the rotation speed of the first motor (107).

8. The grinding equipment based on the nitriding after the nanocrystallization of the die surface according to claim 7, characterized in that: It further includes a rotating ring (501), the rotating ring (501) is rotatably connected with the lifting platform (102), two guide grooves (502) are formed on the base (101), the rotating ring (501) is slidably connected with the guide grooves (502), circumferentially distributed clamping blocks (503) are slidably connected to the top of the rotating ring (501), the rotating ring (501) is provided with circumferentially distributed arc-shaped grooves, the arc-shaped grooves correspond to the clamping blocks (503) one by one, and the rotating ring (501) pushes the clamping blocks (503) to slide along the lifting platform (102) through the arc-shaped grooves.

9. The grinding equipment based on the nitriding after nano - surface treatment of the mold surface as described in claim 8, wherein: The upper part of the guide groove (502) is a straight groove, and the lower part is a curved groove.

10. A grinding method after nitriding for surface nanocrystallization of a mold, applied to the grinding device after nitriding for surface nanocrystallization of a mold according to claim 9, includes the following steps: S1: Place the mold workpiece to be ground on the lifting platform (102) directly below the grinding frame (111); S2: Control the telescopic rod of the cylinder (104) to extend upward until the grinding frame (111) drives the Y-shaped hole (113) to move upward until the upper half of the V-shaped opening is completely blocked by the fixed ring (114), and only the lower half of the I-shaped opening is communicated with the coolant channel of the hollow shaft (110); S3: Start the first motor (107) and the second motor (401); S4: Turn off the first motor (107) and the second motor (401), and control the telescopic rod of the cylinder (104) to shorten downward and reset.

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