Polishing device and polishing method for mechanical casting machining

Abstract

The invention discloses a grinding device and a grinding method for mechanical casting machining, and relates to the technical field of workpiece rotating surface machining machine tools. A polishing device for mechanical casting machining comprises a workbench, the workbench is fixedly connected with an air cylinder, the workbench is connected with a lifting frame in a sliding mode, the lifting frame is fixedly connected with the telescopic end of the air cylinder, and the lifting frame is fixedly connected with an air guide frame used for guiding cold air to the polishing face of a mechanical casting to conduct cooling. When the mechanical casting is polished and the surface temperature of the casting is normal, air is blown to cool the surface of the casting through the first air pump, meanwhile, polishing waste is collected through the second air pump, polishing is automatically stopped immediately when the surface temperature of the casting is too high in the polishing process, and on the basis of air blowing cooling of the first air pump, the polishing efficiency is greatly improved. And the second air pump is switched from a waste collecting mode to a cooling mode to accelerate the cooling rate of the casting, high-temperature deformation of the casting is further prevented, and the device is multifunctional and practical.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece rotating surface processing machine tools, and in particular to a grinding device and a grinding method for machining mechanical castings. Background Art

[0002] During the production process, grinding the rotating surface of cylindrical mechanical castings is a common process in mechanical processing. For example, grinding the surface of a flywheel or flange to make it smooth can reduce friction with the contact surface and improve the efficiency and life of moving parts. In addition, flywheels and flanges usually need to be precisely matched with other components. Surface grinding can ensure their matching accuracy with shafts, bearings, bolts and other components. At the same time, surface grinding can remove unbalanced weight, thereby ensuring that they maintain good dynamic balance when rotating at high speed.

[0003] During the grinding process, high-speed friction between the casting and the grinding wheel will cause high temperature to be generated, and the high temperature will react on the casting to cause the casting to deform. The existing method only uses an air pump to perform a simple air blowing and cooling process, which has a single function. Based on this, the present invention proposes a grinding device and a grinding method for mechanical casting processing, which expands more functions on the basis of the traditional air pump. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above background, the present invention provides a grinding device and a grinding method for machining mechanical castings.

[0005] A grinding device for machining mechanical castings, comprising a workbench, the workbench is fixedly connected to a cylinder, the workbench is slidably connected to a lifting frame, the lifting frame is fixedly connected to the telescopic end of the cylinder, the workbench is slidably connected to a first sliding frame for conveying mechanical castings, the lifting frame is fixedly connected to a first air pump, the lifting frame is fixedly connected to an air guide frame for guiding cold air to the grinding surface of the mechanical casting for cooling, the air guide frame is connected to the first air pump through a pipeline, the lifting frame is installed with a grinder for grinding the rotating surface of the mechanical casting, the workbench is fixedly connected to a collection frame for collecting grinding waste, the collection frame is slidably connected to the lifting frame, The workbench is fixedly connected to a storage rack, the workbench is fixedly connected to a second air pump, the collection rack is fixedly connected to an air duct, the air duct is connected to the second air pump through a pipeline, the air duct is provided with two channels, one of which is connected to the collection rack, and the other channel is used to guide the gas to the polished surface of the casting, the air duct is rotatably connected to a first rotating rack for switching the air duct channel, a connecting rod is rotatably connected between the lifting frame and the first rotating frame, the lifting frame is fixedly connected to an infrared sensor, the infrared sensor is electrically connected to the cylinder through a control module, and the workbench is provided with a driving component for driving the first sliding frame to slide.

[0006] Furthermore, the first rotating frame has a first through hole, one side of the air duct has a second through hole, and the other side of the air duct has a third through hole. When the first rotating frame rotates, the first through hole corresponds to the second through hole and the third through hole alternately.

[0007] Furthermore, it also includes a rack, which is fixedly connected to the lifting frame. The air guide frame is rotatably connected to a second rotating frame. The second rotating frame is fixedly connected to a full gear, which is meshed with the rack. The second rotating frame has an air guide port.

[0008] Furthermore, it also includes a first limit frame symmetrically distributed along the first sliding frame, the first limit frame is slidably connected to the first sliding frame, the first sliding frame is slidably connected to a second limit frame symmetrically distributed along the first sliding frame, the second limit frame has an oblique groove symmetrically distributed along the second limit frame, and the second limit frame is slidably connected to the adjacent first limit frame through the oblique groove.

[0009] Furthermore, it also includes a connecting rod corresponding to the first limiting frame, the connecting rod is fixedly connected to the corresponding first limiting frame, and the side of the workbench close to the connecting rod is provided with inclined surfaces symmetrically distributed along the workbench, and the connecting rod moves horizontally to contact the adjacent inclined surface.

[0010] Furthermore, the connecting rod is configured as an elastic telescopic rod.

[0011] Furthermore, the elastic coefficient of the built-in spring of the elastic telescopic rod is set to 100N / M to 200N / M.

[0012] Furthermore, the driving assembly includes a motor, the motor is fixedly connected to the workbench, the workbench is rotatably connected to a first screw rod, and the first screw rod is threadedly connected to the first sliding frame.

[0013] Furthermore, a second sliding frame is included, the second sliding frame is slidably connected to the first sliding frame along the up and down direction, the first sliding frame is threadedly connected to a second screw rod, and the second screw rod is rotationally connected to the second sliding frame.

[0014] A grinding method for machining mechanical castings comprises the following steps: S1, limit and invert the square mechanical casting in the first sliding frame so that the rotating surface of the cylindrical casting faces upward; S2, starting the grinder and the drive assembly, starting to move the casting, and grinding the rotating surface of the casting; S3. During grinding, start the first air pump and the second air pump. When the surface temperature of the casting is higher than a threshold value, the infrared sensor controls the telescopic end of the cylinder to extend upward through the control module, so that the grinding wheel of the grinder is separated from the surface of the casting, and grinding is stopped. The first air pump and the second air pump cooperate to blow air to cool the casting. When the surface temperature of the casting returns to a normal threshold, the infrared sensor controls the telescopic end of the cylinder to shorten downward through the control module, so that the grinding wheel of the grinder is in contact with the surface of the casting, and grinding is continued. The first air pump blows air to cool the casting, and the second air pump blows air to collect waste generated by grinding.

[0015] The beneficial effects are as follows: 1. When the present invention is grinding a mechanical casting, when the surface temperature of the casting is normal, the first air pump is used to blow air to cool the surface of the casting, and at the same time, the grinding waste is collected by the second air pump. When the surface temperature of the casting is too high during the grinding process, the grinding is automatically stopped immediately. Moreover, on the basis of the first air pump blowing and cooling, the second air pump is switched from the waste collection mode to the cooling mode to speed up the cooling rate of the casting, further preventing the casting from high-temperature deformation. The functions are diverse and practical.

[0016] 2. In the process of raising and lowering the air guide frame, the present invention automatically adjusts the air guide port so that the wind blown out through the air guide frame is always accurately directed toward the contact end face of the casting located at the grinder.

[0017] 3. In the process of the first sliding frame driving the casting to move to the right, the present invention automatically realizes the effect of automatically clamping the casting by the first limit frame and the second limit frame through the cooperation of the connecting rod and the inclined surface, thereby ensuring the stability of the casting during grinding, and through the elastic extension and retraction setting of the connecting rod, the first limit frame and the second limit frame are adapted to clamp castings of various sizes, and castings of various sizes can be smoothly moved to the right for grinding.

[0018] 4. The present invention can adjust the height of the second sliding frame according to the thickness of the casting by adjusting the second screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a partial three-dimensional structural cross-sectional view of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of components such as the cylinder, the lifting frame and the first sliding frame of the present invention.

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the components such as the grinder, the collection rack and the air guide pipe of the present invention.

[0023] Figure 5It is a schematic diagram of the three-dimensional structure of the air guide tube and the first rotating frame of the present invention.

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the wind guide frame, rack, second rotating frame and other components of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the air guide frame, the second rotating frame and the full gear of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the workbench and the first sliding frame of the present invention.

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the first limiting frame, the second limiting frame and the connecting rod of the present invention.

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the first sliding frame, the motor, the first screw and other components of the present invention.

[0029] Fig.11 It is a schematic diagram of the three-dimensional structure of the second sliding frame and the second screw rod of the present invention.

[0030] Names and serial numbers of parts in the figure: 101_workbench, 102_cylinder, 103_lifting frame, 104_first sliding frame, 105_first air pump, 106_air guide frame, 107_grinding machine, 108_collection frame, 109_storage frame, 110_second air pump, 111_air guide pipe, 112_first rotating frame, 113_connecting rod, 114_infrared sensor, 115_first through hole, 116_second through hole, 117_third through hole, 201_rack, 202_second rotating frame, 203_full gear, 204_air guide port, 301_first limiting frame, 302_second limiting frame, 303_connecting rod, 304_inclined surface, 401_motor, 402_first screw, 501_second sliding frame, 502_second screw. DETAILED DESCRIPTION

[0031] The preferred technical solutions of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Embodiment 1: A grinding device for machining mechanical castings, such as Figure 1-Figure 5As shown, it includes a workbench 101, a cylinder 102 is fixedly connected to the lower right side of the workbench 101, a lifting frame 103 is slidably connected to the workbench 101 along the up and down direction, the lifting frame 103 is fixedly connected to the telescopic end of the cylinder 102, a first sliding frame 104 is slidably connected to the upper part of the workbench 101 along the left and right direction, the first sliding frame 104 is used to transport mechanical castings, a first air pump 105 is fixedly connected to the top of the lifting frame 103, and an air guide frame 106 is fixedly connected to the right side of the lifting frame 103, and the air guide frame 106 is used to guide cold air to the machine The grinding surface of the mechanical casting is used to cool down the temperature. The air guide frame 106 is connected to the first air pump 105 through a pipeline. The lifting frame 103 is equipped with a grinder 107, which is used to grind the rotating surface of the mechanical casting. A collection rack 108 for collecting grinding waste is fixedly connected to the middle of the top of the workbench 101. The collection rack 108 is used to collect grinding waste. The collection rack 108 is slidably connected to the lifting frame 103. A storage rack 109 is fixedly connected to the lower rear side of the workbench 101. The lower front side of the workbench 101 is fixedly connected to the second air pump 11 0, the front side of the collecting frame 108 is fixedly connected with an air guide pipe 111, the air guide pipe 111 is connected with the second air pump 110 through a pipeline, the air guide pipe 111 is provided with two left and right channels, the left channel is connected with the collecting frame 108, and the right channel is used to guide the gas to the polishing surface of the casting, the air guide pipe 111 is rotatably connected with the first rotating frame 112, and the first rotating frame 112 is used to switch the left and right channels of the air guide pipe 111, and the lifting frame 103 is rotatably connected with the first rotating frame 112. The connecting rod 113 is rotatably connected between the lifting frame 103 and the first rotating frame 112, and the lifting frame 103 is fixed There is an infrared sensor 114 for detecting the grinding temperature. The infrared sensor 114 is electrically connected to the cylinder 102 through the control module. The workbench 101 is provided with a driving component for driving the first sliding frame 104 to slide. The first rotating frame 112 is provided with a first through hole 115, the left side of the air duct 111 is provided with a second through hole 116, and the right side of the air duct 111 is provided with a third through hole 117. When the first rotating frame 112 rotates, the first through hole 115 corresponds to the second through hole 116 and the third through hole 117 alternately.

[0033] First, the cylindrical mechanical casting is limited and inverted in the first sliding frame 104 so that the rotating surface of the casting faces upward, and then the grinder 107 is started. The grinding wheel of the grinder 107 rotates clockwise, and the driving assembly is started at the same time. The driving assembly drives the first sliding frame 104 to move right along the workbench 101, thereby driving the casting to move right. When the casting passes under the grinder 107 to the right, the grinder 107 grinds the rotating surface of the casting, and the grinding waste splashes clockwise to the left into the collection rack 108. During grinding, the first air pump 105 is started, and the gas pumped out by the air pump enters the air guide frame 106 through the pipeline, and then the air guide frame 106 guides the gas to the grinding surface of the casting, so as to achieve the effect of real-time cooling of the casting and prevent the casting from being deformed due to excessive grinding temperature.

[0034] During the above-mentioned grinding process, when the surface temperature of the casting is higher than the threshold value, the infrared sensor 114 controls the telescopic end of the cylinder 102 to extend upward through the control module, thereby driving the lifting frame 103 to move upward, and then driving the first air pump 105, the air guide frame 106 and the grinder 107 to move upward as a whole, so that the grinding wheel of the grinder 107 is separated from the surface of the casting and the grinding is stopped. At the same time, when the lifting frame 103 moves upward, the first rotating frame 112 is driven to rotate through the connecting rod 113. At this time, the first through hole 115 is switched to correspond to the third through hole 117, and the second air pump 110 is started. The gas pumped out is pumped into the right channel of the air guide pipe 111 through the first through hole 115 and the third through hole 117 in turn, and is blown toward the casting through the right channel outlet of the air guide pipe 111.

[0035] During the above-mentioned grinding process, when the surface temperature of the casting returns to the normal threshold, the telescopic end of the control cylinder 102 is shortened downward, thereby driving the lifting frame 103 to move downward, and then driving the first air pump 105, the air guide frame 106 and the grinder 107 to move downward as a whole, so that the grinding wheel of the grinder 107 contacts the surface of the casting and continues to grind. At the same time, when the lifting frame 103 moves downward, the first rotating frame 112 is driven to reverse through the connecting rod 113. At this time, the first through hole 115 corresponds to the second through hole 116, and the gas pumped out by the second air pump 110 is pumped into the collection rack 108 through the first through hole 115 and the second through hole 116 in turn. Under the blowing action of the gas, the grinding waste on the collection rack 108 enters the storage rack 109 through the pipeline backward for collection and storage.

[0036] In summary, when the present invention is grinding a mechanical casting, when the surface temperature of the casting is normal, the first air pump 105 is used to blow air to cool the surface of the casting, and at the same time, the grinding waste is collected by the second air pump 110. When the surface temperature of the casting is too high during the grinding process, the grinding is automatically stopped immediately. In addition, on the basis of the first air pump 105 blowing air to cool down, the second air pump 110 is switched from the waste collection mode to the cooling mode to speed up the cooling rate of the casting, thereby further preventing the casting from deforming at high temperature. The functions are diverse and practical.

[0037] Embodiment 2: Based on embodiment 1, Figure 6 and Figure 7 As shown, it also includes a rack 201, which is fixedly connected to the front side of the lifting frame 103. The left side of the air guide frame 106 is rotatably connected to the second rotating frame 202. The front end of the second rotating frame 202 is fixedly connected to a full gear 203, which is meshed with the rack 201, and the second rotating frame 202 has an air guide port 204.

[0038] During the lifting and lowering process of the above-mentioned air guide frame 106, the second rotating frame 202 and the full gear 203 are lifted and lowered synchronously with the guide frame. Under the action of the rack 201, the full gear 203 drives the second rotating frame 202 to rotate during the rising process, so that the air guide port 204 is deflected downward toward the casting. During the descending process of the full gear 203, it drives the second rotating frame 202 to reverse, so that the air guide port 204 is deflected upward toward the casting. That is, during the lifting and lowering process of the air guide frame 106, the air guide port 204 is automatically adjusted so that the wind blown out through the air guide frame 106 is always accurately directed toward the contact end face of the casting located at the grinder 107.

[0039] Embodiment 3: Based on embodiment 2, Figure 8 and Fig. 9 As shown, it also includes a first limit frame 301 symmetrically distributed along the first sliding frame 104, the first limit frame 301 is slidably connected to the first sliding frame 104, the first sliding frame 104 is slidably connected to a second limit frame 302 symmetrically distributed along the first sliding frame 104, the bottom of the second limit frame 302 is provided with an oblique groove symmetrically distributed along the second limit frame 302, the second limit frame 302 is slidably connected to the adjacent first limit frame 301 through the oblique groove, a connecting rod 303 is fixedly connected in the middle of the first limit frame 301, the connecting rod 303 is set to an elastic telescopic rod, the elastic coefficient of the built-in spring of the elastic telescopic rod is set to 150N / M, and a side of the workbench 101 close to the connecting rod 303 is provided with an inclined surface 304 symmetrically distributed along the workbench 101, and the connecting rod 303 moves to the right and contacts the adjacent inclined surface 304.

[0040] When the first sliding frame 104 slides to the right, it drives the first limiting frame 301, the second limiting frame 302 and the connecting rod 303 to move to the right together. When the connecting rod 303 contacts the inclined surface 304, the connecting rod 303 drives the two first limiting frames 301 to move towards each other due to the squeezing effect of the inclined surface 304, thereby limiting the front and back sides of the casting. The first limiting frame 301 squeezes the two second limiting frames 302 to move towards each other through the inclined groove, thereby limiting the left and right sides of the casting. In this way, in the process of the first sliding frame 104 driving the casting to move to the right, the first limiting frame 301 and the second limiting frame 302 automatically clamp the casting, thereby ensuring the stability of the casting during grinding.

[0041] During the process of the inclined surface 304 squeezing the connecting rod 303 to make the two first limit frames 301 move towards each other, when the first limit frame 301 contacts the casting, if the connecting rod 303 has not passed through the inclined surface 304, the connecting rod 303 will be adaptively compressed while continuing to move to the right. In this way, it is suitable for clamping castings of various sizes and allows castings of various sizes to be smoothly moved to the right for grinding.

[0042] Embodiment 4: Based on embodiment 3, Fig.10 As shown, the driving assembly includes a motor 401, which is fixedly connected to the left side of the workbench 101. A first screw rod 402 is rotatably connected between the left and right sides of the workbench 101. The first screw rod 402 is threadedly connected to the first sliding frame 104. By starting the motor 401, the first screw rod 402 is driven to rotate, and the first sliding frame 104 can be driven to move from left to right for grinding.

[0043] like Fig.11 As shown, it also includes a second sliding frame 501, which is slidably connected to the first sliding frame 104 along the up and down directions. The first sliding frame 104 is threadedly connected with a second screw 502, and the second screw 502 is rotatably connected to the second sliding frame 501. By adjusting the second screw 502, the height of the second sliding frame 501 can be adjusted according to the thickness of the casting.

[0044] Embodiment 5: Based on Embodiment 4, a grinding method for machining mechanical castings comprises the following steps: S1, limit and invert the cylindrical mechanical casting in the first sliding frame 104 so that the rotating surface of the casting faces upward; S2, start the grinder 107 and the drive assembly, start moving the casting, and grind the rotating surface of the casting; S3. During grinding, start the first air pump 105 and the second air pump 110. When the surface temperature of the casting is higher than the threshold, the infrared sensor 114 controls the telescopic end of the cylinder 102 to extend upward through the control module, so that the grinding wheel of the grinder 107 is separated from the surface of the casting, and grinding is stopped. The first air pump 105 and the second air pump 110 cooperate to blow air to cool the casting. When the surface temperature of the casting returns to the normal threshold, the infrared sensor 114 controls the telescopic end of the cylinder 102 to shorten downward through the control module, so that the grinding wheel of the grinder 107 is in contact with the surface of the casting, and grinding continues. The first air pump 105 blows air to cool the casting, and the second air pump 110 blows air to collect the waste generated by grinding.

[0045] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A grinding device for machining mechanical castings, comprising a workbench (101), wherein the workbench (101) is fixedly connected to a cylinder (102), characterized in that: The workbench (101) is slidably connected to a lifting frame (103), the lifting frame (103) is fixedly connected to the telescopic end of the cylinder (102), the workbench (101) is slidably connected to a first sliding frame (104) for conveying mechanical castings, the lifting frame (103) is fixedly connected to a first air pump (105), the lifting frame (103) is fixedly connected to an air guide frame (106) for guiding cold air to the polishing surface of the mechanical casting for cooling, the air guide frame (106) is connected to the first air pump (105) through a pipeline, the lifting frame (103) is installed with a grinder (107) for polishing the rotating surface of the mechanical casting, the workbench (101) is fixedly connected to a collection frame (108) for collecting polishing waste, the collection frame (108) is slidably connected to the lifting frame (103), the workbench (101) is fixedly connected to a storage rack (109), the workbench (101) is fixedly connected to a second air pump (110), the collection frame (108) is fixedly connected to an air guide pipe (111), the air guide pipe (111) is connected to the second air pump (110) through a pipeline, the air guide pipe (111) is provided with two channels, one of which is connected to the collection frame (108), and the other channel is used to guide the gas to the polished surface of the casting, the air guide pipe (111) is rotatably connected to a first rotating frame (112) for switching the channel of the air guide pipe (111), a connecting rod (113) is rotatably connected between the lifting frame (103) and the first rotating frame (112), the lifting frame (103) is fixedly connected to an infrared sensor (114), the infrared sensor (114) is electrically connected to the cylinder (102) through a control module, and the workbench (101) is provided with a driving component for driving the first sliding frame (104) to slide.

2. A grinding device for machining mechanical castings as claimed in claim 1, characterized in that: The first rotating frame (112) is provided with a first through hole (115), one side of the air guide tube (111) is provided with a second through hole (116), and the other side of the air guide tube (111) is provided with a third through hole (117); when the first rotating frame (112) rotates, the first through hole (115) corresponds to the second through hole (116) and the third through hole (117) in an alternating manner.

3. A grinding device for machining mechanical castings as claimed in claim 2, characterized in that: It also includes a rack (201), the rack (201) being fixedly connected to the lifting frame (103), the air guide frame (106) being rotatably connected to a second rotating frame (202), the second rotating frame (202) being fixedly connected to a full gear (203), the full gear (203) being meshed with the rack (201), and the second rotating frame (202) being provided with an air guide port (204).

4. A grinding device for machining mechanical castings as claimed in claim 3, characterized in that: The invention also comprises a first limiting frame (301) symmetrically distributed along the first sliding frame (104); the first limiting frame (301) is slidably connected to the first sliding frame (104); the first sliding frame (104) is slidably connected to a second limiting frame (302) symmetrically distributed along the first sliding frame (104); the second limiting frame (302) is provided with an oblique groove symmetrically distributed along the second limiting frame (302); the second limiting frame (302) is slidably connected to the adjacent first limiting frame (301) via the oblique groove.

5. A grinding device for machining mechanical castings as claimed in claim 4, characterized in that: It also includes a connecting rod (303) corresponding to the first limiting frame (301), the connecting rod (303) being fixedly connected to the corresponding first limiting frame (301), and a side of the workbench (101) close to the connecting rod (303) is provided with inclined surfaces (304) symmetrically distributed along the workbench (101), and the connecting rod (303) moves horizontally to contact the adjacent inclined surface (304).

6. A grinding device for machining mechanical castings as claimed in claim 5, characterized in that: The connecting rod (303) is configured as an elastic telescopic rod.

7. A grinding device for machining mechanical castings as claimed in claim 6, characterized in that: The elastic coefficient of the built-in spring of the elastic telescopic rod is set to 100N / M to 200N / M.

8. A grinding device for machining mechanical castings as claimed in claim 7, characterized in that: The driving assembly comprises a motor (401), the motor (401) is fixedly connected to the workbench (101), the workbench (101) is rotatably connected to a first screw rod (402), and the first screw rod (402) is threadedly connected to the first sliding frame (104).

9. A grinding device for machining mechanical castings as claimed in claim 8, characterized in that: The invention also comprises a second sliding frame (501), wherein the second sliding frame (501) is slidably connected to the first sliding frame (104) in an up-down direction, the first sliding frame (104) is threadedly connected to a second screw rod (502), and the second screw rod (502) is rotationally connected to the second sliding frame (501).

10. A grinding method for machining mechanical castings, using a grinding device for machining mechanical castings as claimed in any one of claims 1 to 9, comprising the following steps: S1, placing a cylindrical mechanical casting inverted in the first sliding frame (104) so ​​that the rotating surface of the casting faces upward; S2, starting the grinder (107) and the drive assembly, starting to move the casting, and grinding the rotating surface of the casting; S3. During grinding, the first air pump (105) and the second air pump (110) are started. When the surface temperature of the casting is higher than a threshold value, the infrared sensor (114) controls the telescopic end of the cylinder (102) to extend upward through the control module, so that the grinding wheel of the grinder (107) is separated from the surface of the casting, and grinding is stopped. The first air pump (105) and the second air pump (110) cooperate to blow air to cool the casting. When the surface temperature of the casting returns to within a normal threshold value, the infrared sensor (114) controls the telescopic end of the cylinder (102) to shorten downward through the control module, so that the grinding wheel of the grinder (107) is in contact with the surface of the casting, and grinding is continued. The first air pump (105) blows air to cool the casting, and the second air pump (110) blows air to collect waste generated by grinding.

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