Polishing device for valve casting production

Abstract

The invention discloses a polishing device for valve casting production, and relates to the technical field of curved surface polishing, the polishing device comprises a lower support, the upper side of the lower support is fixedly connected with an upper support, the outer wall of the upper support is provided with a control module, and the upper part of the lower support is provided with a polishing mechanism; a pollution discharge mechanism is arranged on the lower portion of the lower support, the grinding mechanism comprises a transmission assembly and a rotating plate, the rotating plate can move up and down relative to the lower support and can rotate, a temperature control mechanism is arranged on the rotating plate, and the temperature control mechanism is connected with the transmission assembly. By arranging the control module, the infrared temperature detection module and the pressure detection module, real-time judgment of the abrasion state of the grinding belt and dynamic adjustment of the grinding pressure can be achieved, then a grinding belt replacement signal is automatically sent out or the position of a casting is adjusted to achieve pressure equalization, the grinding precision is improved, and the service life of the grinding belt is prolonged; the device has the characteristics of high practicability and dynamic adjustment of polishing tracks or parameters.

Description

Technical Field

[0001] The invention relates to the technical field of curved surface grinding, in particular to a grinding device used for valve casting production. Background Art

[0002] Valve castings are widely used in fluid delivery systems. The geometric accuracy of their internal channels, especially the roundness and flatness, directly affects the flow efficiency of the medium, the sealing performance and the precision requirements of subsequent mechanical processing. In the actual production process, due to factors such as casting process errors, cooling deformation or core offset, the inner wall of the valve casting often has a certain degree of roundness deviation, which not only affects its structural strength, but also causes the valve to open poorly, seal failure and even early wear;

[0003] In order to solve the above problems, mechanical grinding is often used in the prior art to trim the inner wall of the valve to achieve higher smoothness and roundness requirements;

[0004] The existing Chinese patent with publication number: CN112975703B discloses an inner wall rust removal and grinding device for valve casting processing. The device adjusts the position of the adjusting sleeve and uses the adjusting rod to adjust the position of the adjusting tube, so as to achieve the adaptability of the grinding block to valves of different diameters, and facilitate the inner wall grinding of valves of different diameters.

[0005] However, the grinding equipment has the following shortcomings: First, the grinding process relies on fixed trajectories and set parameters, and cannot perceive the actual morphological differences of the workpiece in real time; second, it lacks the ability to perceive the state of the grinding process, which can easily cause insufficient or excessive grinding and affect product consistency; third, it is unable to automatically adjust the grinding strategy according to the deformation trend of the workpiece, and it is difficult to meet the needs of intelligent manufacturing and flexible processing, especially in terms of roundness control. It only relies on the initial clamping accuracy and rotation concentricity to ensure the axial symmetry of the inner wall, and lacks a real-time feedback and correction mechanism for the evolution of roundness during the grinding process.

[0006] Therefore, there is an urgent need for an intelligent grinding device that can evaluate the roundness of the inner wall of the valve casting based on the real-time data of the grinding process, especially the pressure change signal, and dynamically adjust the grinding trajectory or parameters accordingly, so as to improve product consistency, reduce the defective rate and enhance the adaptability of the equipment. Summary of the invention

[0007] The object of the present invention is to provide a grinding device for valve casting production to solve the problems raised in the above background technology.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a grinding device for valve casting production, comprising a lower bracket, an upper bracket is fixedly connected to the upper side of the lower bracket, a control module is arranged on the outer wall of the upper bracket, a grinding mechanism is arranged on the upper part of the lower bracket, and a sewage discharge mechanism is arranged on the lower part of the lower bracket;

[0009] The grinding mechanism comprises: a transmission component and

[0010] A rotating plate, the rotating plate can move up and down relative to the lower bracket, and the rotating plate can rotate on its own, and a temperature control mechanism is provided on the rotating plate;

[0011] The temperature control mechanism comprises: a connecting component and:

[0012] The outer shell can rotate relative to the upper bracket, and the outer shell is located at the lower part of the outer ring of the rotating plate. The outer wall of the outer shell can be fixed with a grinding belt to grind the inner wall of the valve casting.

[0013] According to the above technical solution, the transmission assembly includes a fixed plate, the lower side of the fixed plate is fixedly connected to the outer wall of the lower bracket, the inner wall of the fixed plate is fixedly connected to an electric telescopic rod, one end of the electric telescopic rod close to the middle of the lower bracket is fixedly connected to a clamping plate, the outer wall of the upper bracket is slidably connected to two sliding piles, a mounting plate is provided in the middle of the two sliding piles, the left and right sides of the mounting plate extend to the upper sides of the two sliding piles, and the outer wall of the mounting plate is connected to the sliding piles through a pressure detection module, the middle inner wall of the mounting plate is rotatably connected to the outer wall of the rotating plate through a bearing, the rotating plate is fixedly connected to a second motor, the output end of the second motor extends to the lower side of the rotating plate, the temperature control mechanism is arranged at the output end of the second motor, the upper surface of the mounting plate is also fixedly connected to a first motor, the first motor is transmission-connected to the upper surface of the rotating plate through a bevel gear and a gear ring, the upper middle side of the upper bracket is fixedly connected to a third motor, the output end of the third motor is fixedly connected to a threaded rod, the lower end of the threaded rod passes through the rotating plate and extends to the lower part of the rotating plate, and the outer wall of the threaded rod is threadedly connected to the inner wall of the rotating plate.

[0014] According to the above technical solution, two fixed plates are provided on the lower bracket, and two electric telescopic rods are provided on the two fixed plates. The two electric telescopic rods on one fixed plate are connected to the clamping plate, and the four electric telescopic rods are electrically connected to the control module. The four electric telescopic rods can ensure that the clamping plate vertically clamps the valve casting in the middle.

[0015] According to the above technical solution, the first motor, the second motor, the third motor and the pressure detection module are all electrically connected to the control module. The second motor is arranged at the outer ring of the turntable. The third motor can drive the turntable to move in the up and down directions. The pressure detection module can monitor and record the pressure between the mounting plate and the sliding pile.

[0016] According to the above technical solution, the connection assembly includes an infrared temperature detection module. The infrared temperature detection module is arranged on the lower side of the turntable. The temperature control mechanism further includes an extension rod. The upper end of the extension rod is fixedly connected to the output end of the second motor. A spring groove is formed on the outer wall of the lower end of the extension rod. A spring is fixedly connected to the inner wall of the spring groove. The other end of the spring is fixedly connected to the inner wall of the housing.

[0017] According to the above technical solution, the infrared temperature detection module is electrically connected to the control module, and the detection end of the infrared temperature detection module faces the housing. The infrared temperature detection module is used to monitor the working temperature of the housing to avoid failure due to high-temperature grinding.

[0018] According to the above technical solution, the sewage discharge mechanism includes a grille plate. A vertically penetrating opening is formed in the middle of the lower support. The inner wall of the opening is fixedly connected to the outer wall of the grille plate. A converging shell is fixedly connected to the lower side of the lower support. The converging shell is located below the opening. A connecting pipe is fixedly connected to the lower end of the converging shell. The other end of the connecting pipe is fixedly connected to a filter box. An air pump is fixedly connected to one side of the filter box. The air pump is communicated with the inside of the converging shell through the filter box and the connecting pipe.

[0019] According to the above technical solution, the grille plate is of a grille structure. A filter screen is arranged on the side of the filter box connected to the air pump, and the grille plate is located between two clamping plates.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: By providing a turntable that can move up and down and rotate, a first motor, a third motor, and a threaded rod, the grinding head can rotate circumferentially along the inner wall of the valve and simultaneously move vertically in segments, so as to realize uniform grinding of the entire inner wall surface, improve the surface finish of the inner wall and reduce the influence of transverse grinding marks;

[0021] By providing an extension rod with an elastic buffer structure, a spring, and a housing with a replaceable grinding belt, the risk of damage to the casting caused by excessive fitting pressure during the grinding process can be automatically alleviated, and the working temperature at the housing is monitored by the infrared temperature detection module to avoid performance failure of the grinding belt due to local high temperature, ensuring the stability and reliability of the grinding process;

[0022] By setting up a control module, an infrared temperature detection module, and a pressure detection module, it is possible to achieve real-time judgment of the wear state of the grinding belt and dynamic adjustment of the grinding pressure, and then automatically send a signal to replace the grinding belt or adjust the position of the casting to achieve pressure equalization, improve the grinding accuracy and extend the service life of the grinding belt, significantly enhancing the intelligent level of the grinding device;

[0023] By setting up a grille plate, an air pump, and a filter box that penetrate the central axis, an air flow channel from top to bottom can be formed during the grinding process, efficiently discharging dust and heat, avoiding interference of debris with the infrared temperature detection module and the grinding surface, effectively improving the detection accuracy of the system and the cleanliness of the grinding surface, and preventing residues from causing deviations in the grinding quality and sensor signals. Brief Description of the Drawings

[0024] The drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0025] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 is a structural schematic diagram of the lower bracket of the present invention;

[0027] Figure 3 is a structural schematic diagram of the upper bracket of the present invention;

[0028] Figure 4 is a partial structural schematic diagram of the grinding mechanism of the present invention;

[0029] Figure 5 is a sectional structural schematic diagram of the temperature control mechanism of the present invention;

[0030] Figure 6 is a schematic diagram of the lower side structure of the present invention;

[0031] Figure 7 is a schematic diagram of the process of the present invention;

[0032] In the figures: 1, lower bracket; 2, upper bracket; 3, control module; 4, grinding mechanism; 5, sewage discharge mechanism; 401, fixed plate; 402, electric telescopic rod; 403, clamping plate; 404, sliding pile; 405, mounting plate; 406, rotating plate; 407, first motor; 408, second motor; 409, temperature control mechanism; 410, third motor; 411, threaded rod; 412, pressure detection module; 901, infrared temperature detection module; 902, extension rod; 903, spring; 904, housing; 501, grille plate; 502, converging shell; 503, connecting pipe; 504, filter box; 505, air pump. Detailed Embodiments

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1:

[0035] Please refer to Figures 1 - 3 , the present invention provides a technical solution: a grinding device for the production of valve castings, including a lower bracket 1, an upper bracket 2 is fixedly connected to the upper side of the lower bracket 1, a control module 3 is arranged on the outer wall of the upper bracket 2, a grinding mechanism 4 is arranged on the upper part of the lower bracket 1, and a sewage discharge mechanism 5 is arranged on the lower part of the lower bracket 1;

[0036] The grinding mechanism 4 includes: a transmission assembly and: a rotating plate 406, the rotating plate 406 can move in the up and down directions relative to the lower bracket 1, and the rotating plate 406 can rotate, and a temperature control mechanism 409 is arranged on the rotating plate 406, the transmission assembly includes a fixed plate 401, the lower side of the fixed plate 401 is fixedly connected to the outer wall of the lower bracket 1, the inner wall of the fixed plate 401 is fixedly connected to the electric telescopic rod 402, and the end of the electric telescopic rod 402 close to the middle of the lower bracket 1 is fixedly connected to the clamping plate 403, and the outer wall of the upper bracket 2 is slidably connected to two sliding piles 404, and the two sliding piles 404 A mounting plate 405 is provided in the middle part, and the left and right sides of the mounting plate 405 extend to the upper sides of the two sliding piles 404, and the outer wall of the mounting plate 405 is connected to the sliding pile 404 through the pressure detection module 412, and the middle inner wall of the mounting plate 405 is rotatably connected to the outer wall of the rotating plate 406 through a bearing, and the rotating plate 406 is fixedly connected to the second motor 408, and the output end of the second motor 408 extends to the lower side of the rotating plate 406, and the temperature control mechanism 409 is arranged at the output end of the second motor 408, and the upper surface of the mounting plate 405 is also fixedly connected to the first motor 407, and the first motor The motor 407 is connected to the upper surface of the rotating plate 406 through a bevel gear and a gear ring. A third motor 410 is fixedly connected to the upper middle side of the upper bracket 2. A threaded rod 411 is fixedly connected to the output end of the third motor 410. The lower end of the threaded rod 411 penetrates the rotating plate 406 and extends to the lower part of the rotating plate 406. The outer wall of the threaded rod 411 is threadedly connected to the inner wall of the rotating plate 406. Two fixed plates 401 are provided on the lower bracket 1, and two electric telescopic rods 402 are provided on the two fixed plates 401. The two electric telescopic rods 402 on one fixed plate 401 All are connected to the clamping plate 403, and the four electric telescopic rods 402 are all electrically connected to the control module 3. The four electric telescopic rods 402 can ensure that the clamping plate 403 vertically clamps the valve casting in the middle. The first motor 407, the second motor 408, the third motor 410 and the pressure detection module 412 are all electrically connected to the control module 3. The second motor 408 is arranged at the outer ring of the rotating plate 406, and the third motor 410 can drive the rotating plate 406 to move in the up and down directions. The pressure detection module 412 can monitor and record the pressure between the mounting plate 405 and the sliding pile 404;

[0037] During the actual application of this device, the valve casting is placed in the middle of two clamping plates 403, and the valve casting is placed vertically. Then, the electric telescopic rod 402 is started to push the clamping plates 403 to move synchronously. The electric telescopic rods 402 on both sides push the clamping plates 403 to clamp the casting in the middle. Then, the third motor 410 is started to drive the threaded rod 411 to rotate and at the same time lock the first motor 407 to make the rotating plate 406 unable to rotate. At this time, due to the rotation of the threaded rod 411, the rotating plate 406 will descend, and then the temperature control mechanism 409 will move into the valve casting. Then, the third motor 410 is turned off and the first motor 407 is started to drive the rotating plate 406 to rotate. At the same time, the second motor 408 is started, and the temperature control mechanism 409 at its lower end polishes the inner wall of the valve. After polishing a full circle of the inner wall of the valve, the first motor 407 can be locked and the rotating plate 406 is driven to move upward by the third motor 410. Then, the first motor 407 is started again to polish the inner wall of the valve, and then the polishing operation of the inner wall of the valve is completed in turn.

[0038] Embodiment 2:

[0039] Please refer to Figures 1 - 5 , on the basis of Embodiment 1, a technical solution is provided: The temperature control mechanism 409 includes: a connection component and: a housing 904. The housing 904 can rotate relative to the upper bracket 2, and the housing 904 is located at the lower outer circle of the rotating plate 406. The outer wall of the housing 904 can be fixed with a polishing belt to polish the inner wall of the valve casting. The connection component includes an infrared temperature detection module 901. The infrared temperature detection module 901 is arranged on the lower side of the rotating plate 406. The temperature control mechanism 409 further includes an extension rod 902. The upper end of the extension rod 902 is fixedly connected to the output end of the second motor 408. A spring groove is opened on the outer wall of the lower end of the extension rod 902. A spring 903 is fixedly connected to the inner wall of the spring groove. The other end of the spring 903 is fixedly connected to the inner wall of the housing 904. The infrared temperature detection module 901 is electrically connected to the control module 3, and the detection end of the infrared temperature detection module 901 faces the housing 904. The infrared temperature detection module 901 is used to monitor the working temperature of the housing 904 to avoid the failure of high-temperature polishing;

[0040] During the process of driving the temperature control mechanism 409 by the second motor 408 to polish the inner wall of the valve, different meshes of polishing belts can be fixed on the outer wall of the housing 904 to adapt to the polishing conditions. During the startup of the second motor 408, the transmission of the extension rod 902 will cause the housing 904 to closely adhere to the inner wall of the valve and rotate. The polishing belt on its outer wall contacts and rubs against the inner wall of the valve to complete the polishing. At the same time, the spring 903 supports the relative displacement between the housing 904 and the extension rod 902. When the pressure of the extension rod 902 squeezing the housing 904 against the inner wall of the valve is too large, it can be buffered by the deformation of the spring 903 to avoid excessive polishing force. At the same time, the infrared temperature detection module 901 detects the working temperature at the housing 904 in real time. When the temperature at the housing 904 is detected to be too high, the second motor 408 can be turned off to cool the housing 904, avoiding polishing failure caused by high temperature and excessive wear of the polishing belt.

[0041] Embodiment 3:

[0042] Please refer to Figures 1 - 7 , based on Embodiment 1 and Embodiment 2, a technical solution is provided: during the process of the device polishing the valve casting, the control module 3 monitors the rotation speed and real-time power of the second motor 408. At the same time, the control module 3 also reads the temperature detected by the infrared temperature detection module 901 and the pressure values detected by the pressure detection modules 412 on both sides. When the detected temperature at the infrared temperature detection module 901 does not reach the threshold and the rotation speed of the second motor 408 remains unchanged while the power drops by a preset value, it indicates that the friction between the polishing belt on the outer side of the housing 904 and the inner wall of the valve decreases, and then it is judged that the polishing belt is severely worn. At this time, the control module 3 shuts down the device and sends a request to replace the polishing belt to the operation terminal. When the pressure value detected by one of the pressure detection modules 412 exceeds the set range, the controller control module 3 judges that the current polishing force is too large and the roundness of the inner wall of the valve is insufficient, which may cause damage to the inner wall of the valve or abnormal wear of the polishing belt. At this time, the control module 3 starts the electric telescopic rod 402 to drive the valve to move towards the side with greater pressure. If the pressure detected by the pressure detection module 412 is too small, it drives the electric telescopic rod 402 to move in the reverse direction, thereby avoiding excessive or insufficient pressure between the polishing belt and the inner wall of the valve. The controller control module 3 can dynamically adjust the polishing strategy through comprehensive judgment of the signals of the above multiple sensors, extend the service life of the polishing belt while ensuring the polishing quality, improve the intelligent level of the polishing process, and calculate the roundness of the inner wall of this batch of valves through the change of the pressure detected by the pressure detection modules 412 on both sides during the polishing process, thereby improving the smoothness of subsequent work. Specifically:

[0043] P L (θ): The pressure of the left pressure detection module 412 at the θ angle;

[0044] P RP(θ): The pressure at the θ angle of the right - hand pressure detection module 412;

[0045] θ∈[0,2π]: The angle for the grinding head to rotate one full circle;

[0046] ΔP(θ) = |P L (θ)-P R (θ)|: The left - right pressure difference;

[0047] The left - right average pressure;

[0048] Δr(θ): The radial deviation of the inner wall of the valve relative to the ideal center;

[0049] In an ideal situation, if the inner wall of the valve is a standard circle, during the rotation of the grinding head, P L and P R should always be basically the same, and the pressure difference ΔP(θ)≈0;

[0050] If there is elliptical deformation or eccentricity, and the clamping position of the grinding head deviates from the center, then ΔP(θ) will fluctuate greatly at different angles, and such fluctuations can be used to fit the non - circularity deviation of the valve;

[0051] Therefore, a roundness deviation index R d is defined as:

[0052]

[0053] where: R d represents the roundness deviation of the inner wall of the valve, and the closer it is to 0, the more circular;

[0054] is a small constant to prevent the denominator from being 0;

[0055] Simplified to discrete values:

[0056]

[0057] N:: The number of sampling points;

[0058] R d <0.05: Good roundness, no correction required;

[0059] 0.05 ≤ R d <0.15: Slight eccentricity, the controller control module 3 can fine - tune the clamping plate 403 or the clamping force;

[0060] R d ≥0.15: Obvious eccentricity or local deformation, the grinding head needs to adjust the trajectory or be manually repaired;

[0061] Example Four:

[0062] Please refer toFigures 1 - 7 On the basis of the first embodiment, the second embodiment and the third embodiment, a technical solution is provided: the sewage discharge mechanism 5 includes a grid plate 501. A vertically penetrating opening is formed in the middle of the lower bracket 1, and the inner wall of the opening is fixedly connected to the outer wall of the grid plate 501. A converging shell 502 is fixedly connected to the lower side of the lower bracket 1. The converging shell 502 is located on the lower side of the opening. A communicating pipe 503 is fixedly connected to the lower end of the converging shell 502. The other end of the communicating pipe 503 is fixedly connected to a filter box 504. An air pump 505 is fixedly connected to one side of the filter box 504. The air pump 505 is communicated with the inside of the converging shell 502 through the filter box 504 and the communicating pipe 503. The grid plate 501 is of a grid structure. A filter screen is arranged on the side of the filter box 504 connected to the air pump 505, and the grid plate 501 is located between two clamping plates 403;

[0063] In this embodiment, the air in the filter box 504 can be pumped out by the air pump 505, so that the air flow is input from the upper side of the grid plate 501, and an air flow passage is formed through the converging shell 502, the communicating pipe 503 and the filter box 504. Since the valve is placed vertically, the air flow will enter from the upper side of the valve and be discharged from the lower side of the valve. At this time, the debris generated by the grinding of the inner wall of the valve and the high temperature are carried away by the air flow from top to bottom. The debris is intercepted by the filter screen arranged inside the filter box 504, thereby avoiding the influence of the foreign matter ground on the inner wall of the valve on the detection accuracy of the infrared temperature detection module 901, and reducing the influence of the adhesion on the inner wall of the valve on the friction coefficient during the operation of the grinding belt on the outer side of the housing 904, thereby reducing the possibility of sensor drift of this device. During the working process, the working power of the air pump 505 can be adjusted by the control module 3 reading the average pressure of the two pressure detection modules 412 to achieve the purpose of efficiency optimization. Specifically:

[0064] P L : The current grinding pressure, which is the average value of the two pressure detection modules 412;

[0065] P ref : The reference grinding pressure;

[0066] Q: The air extraction flow rate of the air pump;

[0067] Q base : The minimum air extraction flow rate;

[0068] ΔP: The pressure deviation;

[0069] k: The adjustment coefficient;

[0070] Q max : The maximum air extraction flow rate allowed by the air pump;

[0071] Q = min(Q base + k·max(0, P L - P ref ), Qmax )

[0072] When the actual grinding pressure P L is at or below the reference value P ref , only the basic air extraction power is maintained;

[0073] When P L is higher than P ref , it indicates that the grinding force increases and more debris and heat are released. At this time, the air extraction flow rate is linearly increased to enhance the discharge of waste chips and temperature control;

[0074] The air extraction flow rate is limited by the maximum value Q max to prevent the negative pressure of the device from being disordered or affecting the grinding stability caused by over-extraction.

[0075] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0076] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A grinding device for the production of valve castings, including a lower bracket (1), characterized in that: The upper side of the lower bracket (1) is fixedly connected to the upper bracket (2), the outer wall of the upper bracket (2) is provided with a control module (3), the upper part of the lower bracket (1) is provided with a grinding mechanism (4), and the lower part of the lower bracket (1) is provided with a sewage discharge mechanism (5); The grinding mechanism (4) comprises: a transmission component and A rotating plate (406), the rotating plate (406) being movable in an up-and-down direction relative to the lower support (1), and the rotating plate (406) being capable of self-rotation, and a temperature control mechanism (409) being disposed on the rotating plate (406); The temperature control mechanism (409) comprises: a connection component and: The outer shell (904) can rotate relative to the upper bracket (2), and the outer shell (904) is located at the lower part of the outer ring of the rotating plate (406). The outer wall of the outer shell (904) can be fixed with a grinding belt to grind the inner wall of the valve casting.

2. The grinding device for valve casting production according to claim 1, wherein: The transmission assembly comprises a fixed plate (401), the lower side of the fixed plate (401) is fixedly connected to the outer wall of the lower bracket (1), the inner wall of the fixed plate (401) is fixedly connected to an electric telescopic rod (402), one end of the electric telescopic rod (402) close to the middle of the lower bracket (1) is fixedly connected to a clamping plate (403), the outer wall of the upper bracket (2) is slidably connected to two sliding piles (404), a mounting plate (405) is provided in the middle of the two sliding piles (404), the left and right sides of the mounting plate (405) extend to the upper side of the two sliding piles (404), and the outer wall of the mounting plate (405) is connected to the sliding piles (404) through a pressure detection module (412), the inner wall of the middle part of the mounting plate (405) is rotatably connected to the outer wall of the rotating plate (406) through a bearing, and the A second motor (408) is fixedly connected to the rotating plate (406), and an output end of the second motor (408) extends to the lower side of the rotating plate (406). The temperature control mechanism (409) is arranged at the output end of the second motor (408). A first motor (407) is also fixedly connected to the upper surface of the mounting plate (405), and the first motor (407) is transmission-connected to the upper surface of the rotating plate (406) via a bevel gear and a gear ring. A third motor (410) is fixedly connected to the upper middle side of the upper bracket (2), and a threaded rod (411) is fixedly connected to the output end of the third motor (410), and the lower end of the threaded rod (411) passes through the rotating plate (406) and extends to the lower part of the rotating plate (406), and the outer wall of the threaded rod (411) is threadedly connected to the inner wall of the rotating plate (406).

3. The grinding device for valve casting production according to claim 2, wherein: The lower bracket (1) is provided with two fixing plates (401), and the two fixing plates (401) are each provided with two electric telescopic rods (402), the two electric telescopic rods (402) on one fixing plate (401) are each connected to a clamping plate (403), the four electric telescopic rods (402) are each electrically connected to a control module (3), and the four electric telescopic rods (402) can ensure that the clamping plate (403) vertically clamps the valve casting in the middle.

4. A grinding device for valve casting production according to claim 3, characterized in that: The first motor (407), the second motor (408), the third motor (410) and the pressure detection module (412) are all electrically connected to the control module (3). The second motor (408) is arranged at the outer ring of the rotating plate (406). The third motor (410) can drive the rotating plate (406) to move in the up and down directions. The pressure detection module (412) can monitor and record the pressure between the mounting plate (405) and the sliding pile (404).

5. The grinding device for valve casting production according to claim 4, wherein: The connection assembly includes an infrared temperature detection module (901). The infrared temperature detection module (901) is arranged on the lower side of the rotating plate (406). The temperature control mechanism (409) further includes an extension rod (902). The upper end of the extension rod (902) is fixedly connected to the output end of the second motor (408). A spring groove is formed on the outer wall of the lower end of the extension rod (902). A spring (903) is fixedly connected to the inner wall of the spring groove. The other end of the spring (903) is fixedly connected to the inner wall of the outer shell (904).

6. The grinding device for valve casting production according to claim 5, characterized in that: The infrared temperature detection module (901) is electrically connected to the control module (3), and the detection end of the infrared temperature detection module (901) faces the outer shell (904). The infrared temperature detection module (901) is used to monitor the working temperature of the outer shell (904) to avoid failure due to high-temperature grinding.

7. A grinding device for valve casting production according to claim 6, characterized in that: The sewage discharge mechanism (5) includes a grille plate (501). A vertically penetrating opening is formed in the middle of the lower bracket (1). The inner wall of the opening is fixedly connected to the outer wall of the grille plate (501). A converging shell (502) is fixedly connected to the lower side of the lower bracket (1). The converging shell (502) is located below the opening. A connecting pipe (503) is fixedly connected to the lower end of the converging shell (502). The other end of the connecting pipe (503) is fixedly connected to a filter box (504). An air pump (505) is fixedly connected to one side of the filter box (504). The air pump (505) is communicated with the inside of the converging shell (502) through the filter box (504) and the connecting pipe (503).

8. A grinding device for valve casting production according to claim 7, characterized in that: The grille plate (501) is of a grille structure. A filter is arranged on the side of the filter box (504) connected to the air pump (505), and the grille plate (501) is located between two clamping plates (403).

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