Surface treatment device and method for high-pressure valve casting production

Abstract

The invention provides a surface treatment device and method for high-pressure valve casting production, and belongs to the technical field of casting surface treatment. Comprising a base body, a control assembly installed on one side of the top of the base body, a grinding mechanism and a fixing mechanism installed on the other side of the top of the base body and used for clamping a casting, and the control assembly is used for controlling the grinding mechanism to move left and right to grind the inner surface of the casting; and the grinding wheel cannot extend into the outlet of the valve rod, so that the grinding consistency is ensured, and the condition of non-uniform grinding or excessive grinding during grinding is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of casting surface treatment, and in particular relates to a surface treatment device and method for producing high-pressure valve castings. Background Art

[0002] A high-pressure valve is a device used to control the flow of fluid in a high-pressure system. The flow of fluid is controlled by driving the valve core to rotate, rise or fall by the valve stem, which requires the inner wall of the valve core and the ball valve body to remain smooth. Otherwise, during the rotation of the valve core, the rough inner wall of the ball valve body will cause scratches on the outer surface of the valve core. These scratches may affect the sealing of the valve when it is in the closed state. Therefore, the surface of the valve casting needs to be polished to ensure the smoothness of its inner wall.

[0003] The application document with publication number CN118123624A discloses a ball valve body processing technology, including a U-shaped structure base, a processing fixed seat slidably connected to the base, a guide rod and a cylinder fixedly installed on the processing fixed seat, a linear slider slidably connected to the guide rod, the telescopic end of the cylinder fixedly installed on the linear slider, a support rod fixedly installed on the linear slider, a C-shaped structure No. 1 fixed block hinged to the support rod, a rotating motor fixedly installed on the No. 1 fixed block, a rotating rod fixedly installed on the output shaft of the rotating motor, and a grinding ball fixedly installed on the rotating rod. The scheme designs an adjustable spring telescopic rod and a hydraulic pipe. By adjusting the spring telescopic rod, the angle of the adjustable rotating rod can be changed so that the grinding ball fits the inner wall of the valve cavity, solving the problem of incomplete manual grinding.

[0004] When existing equipment is grinding the inner wall of a valve body, especially the valve body of a ball valve, due to its spherical inner wall structure, the grinding equipment needs to be placed into the valve cavity through the inlet and outlet of the ball valve for grinding, resulting in a more complicated grinding process for the inner wall of the valve body and greater grinding difficulty. In particular, when the grinding equipment is grinding to the valve stem outlet, due to the concave inner wall of the valve body at the outlet, the grinding wheel can easily extend into the outlet, resulting in uneven grinding or over-grinding, which affects the sealing of the casting. Summary of the invention

[0005] The purpose of the present invention is to provide a surface treatment device and method for the production of high-pressure valve castings, aiming to solve the problems in the prior art that the grinding process of the inner wall of the valve body is relatively complicated, the grinding is difficult, and uneven grinding or excessive grinding is prone to occur during grinding, which affects the sealing of the casting.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a surface treatment device for the production of high-pressure valve castings, comprising a seat body and a control component installed on one side of the top of the seat body, and also comprising a grinding mechanism and a fixing mechanism installed on the other side of the top of the seat body and used to clamp the casting, the control component is used to control the grinding mechanism to move left and right to grind the inner surface of the casting.

[0007] The grinding mechanism includes a support rod, an adjustment component, a driving device, a connecting column, a connecting plate, a fixed rod and a V-shaped rod. One end of the support rod is slidably connected to the control component, and the other end is fixed to the connecting column. A hollow cavity is provided in the connecting column for the connecting plate to slide. A plurality of connecting rods are installed on the side of the connecting plate away from the support rod. The connecting rod slides through the connecting column and is hinged with a connecting block. One end of the V-shaped rod is hinged to the connecting block, and the other end is fixedly installed with a U-shaped plate, and its bending part is hinged to the fixed rod fixed to the connecting column. A grinding wheel is hinged on one U-shaped plate, and the other is hinged with ball bearings. The adjusting component adjusts the position of the connecting plate, and the driving device drives the grinding wheel to rotate.

[0008] The effect is that the grinding wheel and the ball can be opened or closed synchronously. When the grinding wheel grinds to the outlet of the valve stem on the valve body, the ball will contact the inner surface of the valve body, and the grinding wheel will not extend into the outlet of the valve stem, thereby ensuring the consistency of grinding and avoiding uneven grinding or excessive grinding.

[0009] The adjusting assembly includes an adjusting rod, a guide rail, a load-bearing basket, two pulleys, a wire rope and a transmission rod. The adjusting rod is slidably sleeved on the supporting rod. The guide rail is installed at one end of the control assembly close to the fixing mechanism. The load-bearing basket slides up and down along the guide rail. A pulley is arranged in the air above the load-bearing basket and is fixedly connected to the control assembly. The other pulley is fixedly installed in the middle part below the adjusting rod. One end of the wire rope is fixedly connected to one end of the adjusting rod close to the control assembly, and the other end is connected to the load-bearing basket after being guided by the pulley. The transmission rod is installed between the adjusting rod and the connecting plate and slides through the connecting column.

[0010] The driving device comprises a motor mounted on the supporting rod, and a transmission member is connected between the output shaft of the motor and the rotating shaft of the grinding wheel.

[0011] The effect is that the friction between the grinding wheel and the inner surface of the valve body can be changed by increasing or decreasing the weight of the weight, thereby controlling the degree of grinding.

[0012] The fixing mechanism includes two parallel fixed components and a clamping ring. The fixing component includes a lower fixing part and an upper fixing part. One side of the lower fixing part and the upper fixing part is hinged to achieve flexible opening and closing, and the other side is provided with a locking part to ensure stability during tightening. Fixing holes are opened on the fixing component and are symmetrically distributed on the lower fixing part and the upper fixing part. The inner wall of the fixing hole is provided with a fixing groove for rotating the clamping ring. The clamping ring is composed of two symmetrical semicircular rings. After assembly, a complete circular ring structure is formed, and its inner ring wall is provided with a clamping groove for installing a workpiece.

[0013] The effect is that the valve body can be quickly fixed and driven to rotate, and the directional grinding mechanism extends into the interior to grind its inner surface.

[0014] The inner ring walls of the two semicircular rings are provided with limiting grooves along their radial direction. The fixing mechanism also includes a gear ring, a transmission shaft and a driving component for driving the gear ring to rotate. The gear ring is located between the two fixed components and is arranged parallel to them. A V-shaped transmission shaft is provided on both sides of the inner wall of the gear ring. The bending part of the transmission shaft is fixedly connected to the gear ring, and the two ends of the transmission shaft are respectively slidably sleeved in the limiting grooves on the clamping rings in the two fixed components.

[0015] The driving assembly comprises a motor fixedly mounted on the top of the seat body, and a gear meshing with the gear ring is mounted on the output shaft of the motor.

[0016] The effect is that the valve body can be driven to rotate through the gear ring and the transmission shaft, so that the grinding mechanism can evenly grind the inner surface of the valve body.

[0017] The control component includes a shell with a top of a seat body, a lead screw, a slider, a servo motor and a transmission belt. A guide groove for socketing a support rod is provided on one side of the top of the shell, and a connecting groove is provided between the inner top wall of the shell and the guide groove. The lead screw is rotatably installed on the top of the inner wall of the shell and its axial direction is the same as the moving direction of the support rod. The slider is threadedly socketed on the lead screw and the top end slides through the connecting groove and is fixedly connected to the support rod. The servo motor is installed in the shell, and its output shaft is transmission-connected to one end of the lead screw through a transmission belt.

[0018] The effect is that the grinding mechanism can be controlled to extend into the interior of the valve body and reciprocate left and right therein, thereby ensuring that the grinding assembly can fully grind the inner surface of the valve body and avoiding omissions.

[0019] The present invention also includes a surface treatment method for a high pressure valve casting, and the treatment method is as follows: The workpiece is fixed to the fixing mechanism and driven to rotate. The grinding end of the grinding mechanism is controlled to move to the inside of the workpiece through the control component, and the grinding end of the grinding mechanism is controlled to move left and right inside the workpiece. The position of the connecting plate is adjusted through the adjustment component so that the grinding wheel and the ball can contact the inner surface of the workpiece. The grinding wheel is driven to rotate through the driving device to grind the inner surface of the workpiece.

[0020] Compared with the prior art, the present invention has the following beneficial effects: When the grinding wheel grinds to the outlet of the valve stem on the valve body, the ball contacts the inner surface of the valve body, and the grinding wheel does not extend into the outlet of the valve stem, ensuring the consistency of grinding and avoiding uneven grinding or excessive grinding. At the same time, the friction between the grinding wheel and the inner surface of the valve body can be changed by increasing or decreasing the weight of the weight, thereby controlling the degree of grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a 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 of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of the valve casting surface treatment device in the present invention; Figure 2 It is a structural schematic diagram of the telescopic control component in the present invention; Figure 3 It is a structural schematic diagram of the valve casting fixing mechanism in the present invention; Figure 4 It is a schematic diagram of the connection structure of the fixing mechanism in the present invention; Figure 5 It is a schematic diagram of the valve casting installation process in the present invention; Figure 6 It is a structural schematic diagram of the grinding mechanism in the present invention; Figure 7 It is a schematic diagram of the structure of the grinding component in the present invention; Figure 8 It is a schematic structural diagram of the valve body workpiece in the present invention.

[0022] In the figure: 1, seat; 2, control assembly; 21, housing; 22, guide slide; 221, connecting groove; 23, lead screw; 24, slider; 25, servo motor; 26, transmission belt; 3, grinding mechanism; 31, support rod; 32, adjustment assembly; 321, adjustment rod; 322, guide rail; 323, load-bearing basket; 324, pulley; 325, wire rope; 326, transmission rod; 33, driving device; 34, connecting column; 3 51. Connecting plate; 352. Connecting rod; 353. Fixing rod; 354. V-shaped rod; 355. Connecting block; 356. U-shaped plate; 357. Grinding wheel; 358. Ball; 4. Fixing mechanism; 41. Lower fixing piece; 42. Upper fixing piece; 43. Fixing hole; 431. Fixing groove; 44. Clamping ring; 45. Clamping groove; 46. Limiting slide groove; 47. Gear ring; 48. Transmission shaft; 49. Drive assembly; 5. Valve body. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 8 The present invention provides the following technical solutions: A surface treatment device for high-pressure valve casting production, comprising a seat body 1, a control component 2, a grinding mechanism 3 and a fixing mechanism 4 for clamping a valve body 5, wherein the control component 2 and the fixing mechanism 4 are respectively mounted on both sides of the top of the seat body 1, and the grinding mechanism 3 is mounted on the control component 2, and the control component 2 controls the grinding mechanism 3 to move back and forth left and right to grind the inner wall of the valve body 5.

[0025] refer to Figure 2 , Figure 6 and Figure 7As shown, the grinding mechanism 3 includes a support rod 31, an adjustment component 32, a driving device 33, a connecting column 34 with a hollow cavity, a connecting plate 351 and a V-shaped rod 354. One end of the support rod 31 is slidably sleeved on the control component 2, and the other end is fixedly connected to one end of the connecting column 34. The connecting plate 351 is slidably sleeved in the hollow cavity of the connecting column 34. At least two connecting rods 352 are installed on the side of the connecting plate 351 away from the support rod 31. One end of the connecting rod 352 slides through the connecting column 34 and is hinged with a connecting block 355. The connecting column A fixing rod 353 having the same number as the connecting rod 352 and corresponding position is fixedly installed on one side 34 away from the connecting disk 351. One end of the V-shaped rod 354 is hinged to the connecting block 355, and a U-shaped plate 356 is fixedly installed on the other end. The bending part of the V-shaped rod 354 is hinged to the fixing rod 353. A grinding wheel 357 is hinged to one of the U-shaped plates 356 through a rotating shaft, and balls 358 are hinged to the other U-shaped plates 356. The adjusting component 32 is used to adjust the position of the connecting disk 351, and the driving device 33 is used to drive the grinding wheel 357 to rotate.

[0026] The adjusting assembly 32 includes an adjusting rod 321, a guide rail 322, a load-bearing basket 323, two pulleys 324, a wire rope 325 and a transmission rod 326. The adjusting rod 321 is slidably sleeved on the supporting rod 31. The guide rail 322 is installed at one end of the control assembly 2 close to the fixing mechanism 4. The load-bearing basket 323 slides up and down along the guide rail 322. A pulley 324 is arranged above the load-bearing basket 323 and is fixedly connected to the control assembly 2. The other pulley 324 is fixedly installed in the middle part below the adjusting rod 321. One end of the wire rope 325 is fixedly connected to one end of the adjusting rod 321 close to the control assembly 2, and the other end is connected to the load-bearing basket 323 after being guided by the pulley 324. The transmission rod 326 is installed between the adjusting rod 321 and the connecting plate 351 and slides through the connecting column 34.

[0027] The driving device 33 includes a motor installed on the support rod 31, and a support plate is fixedly installed on the V-shaped rod 354 corresponding to the grinding wheel 357. The fixed rod 353 corresponding to the grinding wheel 357 and the support plate are both provided with rotating shafts, and the two rotating shafts are connected by a synchronous belt transmission. The rotation shaft on the support plate and the rotating shaft of the grinding wheel 357 are connected by a pair of mutually meshing bevel gears, and the rotating shaft on the fixed rod 353 is connected to the output shaft of the motor by a synchronous belt transmission.

[0028] refer to Figure 3-Figure 5As shown, the fixing mechanism 4 includes two parallel and symmetrically arranged fixing components, a clamping ring 44, a gear ring 47, a transmission shaft 48 and a driving component 49 for driving the gear ring 47 to rotate. A fixing hole 43 is provided on the fixing component, and a fixing groove 431 is provided in the middle of the inner wall of the fixing hole 43. The clamping ring 44 includes two symmetrically arranged semicircular rings, which are rotatably sleeved in the fixing groove 431. A clamping groove 45 for installing the flange at the inlet and outlet of the valve body 5 is provided in the middle of the inner ring wall of the clamping ring 44. A limiting groove 46 is provided in the middle of the inner ring wall of the two semicircular rings of the clamping ring 44. The gear ring 47 is located between the two fixing components and is arranged parallel to them. A V-shaped transmission shaft 48 is provided on both sides of the inner wall of the gear ring 47. The bending part of the transmission shaft 48 is fixedly connected to the gear ring 47, and the two ends of the transmission shaft 48 are respectively slidably sleeved in the limiting grooves 46 on the clamping ring 44 in the two fixing components.

[0029] The fixing assembly includes a lower fixing part 41 and an upper fixing part 42, and fixing holes 43 are symmetrically opened on the lower fixing part 41 and the upper fixing part 42. One side of the lower fixing part 41 and the upper fixing part 42 is hinged, and the other side is provided with a locking part for fixing the lower fixing part 41 and the upper fixing part 42. The driving assembly 49 includes a motor fixedly installed on the top of the base body 1, and a gear meshing with the ring gear 47 is installed on the output shaft of the motor.

[0030] refer to Figure 1 and Figure 2 As shown, the control component 2 includes a shell 21 provided on the top of the base body 1, a lead screw 23, a slider 24, a servo motor 25 and a transmission belt 26. A guide groove 22 for sleeve-connecting the support rod 31 is provided on one side of the top of the shell 21. A connecting groove 221 is provided between the inner top wall of the shell 21 and the guide groove 22. The lead screw 23 is rotatably mounted on the top of the inner wall of the shell 21 and its axial direction is the same as the moving direction of the support rod 31. The slider 24 is threadedly sleeved on the lead screw 23 and the top end slides through the connecting groove 221 and is fixedly connected to the support rod 31. The servo motor 25 is installed in the shell 21, and its output shaft is transmission-connected to one end of the lead screw 23 through the transmission belt 26.

[0031] The present invention also includes a surface treatment method for a high-pressure valve casting, which specifically includes the following steps: Step 1: Fix the valve body 5 to the fixing mechanism 4 and drive it to rotate via the driving assembly 49 .

[0032] Step 2: Control the grinding end of the grinding mechanism 3 to extend into the interior of the valve body 5 through the inlet (outlet) of the valve body 5 through the control component 2, and control the grinding end of the grinding mechanism 3 to move left and right inside the valve body 5.

[0033] Step three: adjust the position of the connecting plate 351 through the adjusting assembly 32 so that the grinding wheel 357 and the ball 358 can contact the inner surface of the valve body 5 .

[0034] Step 4: Drive the grinding wheel 357 to rotate through the driving device 33 to grind the inner surface of the valve body 5 .

[0035] The implementation principle of the embodiment of the present invention is as follows: the flanges of the inlet and outlet of the valve body 5 are placed in the clamping grooves 45 on the clamping ring 44, and then the upper fixing member 42 is locked on the lower fixing member 41 by means of the locking member, and the driving assembly 49 is started to drive the gear ring 47 and the valve body 5 to rotate, and at the same time, the servo motor 25 is started to drive the lead screw 23 to rotate. Since the slider 24 is threadedly connected to the lead screw 23, as the lead screw 23 is selected, the slider 24 drives the support rod 31 to extend out of the guide slot 22, and the support rod 31 pushes the connecting column 34 into the interior through the inlet (outlet) of the valve body 5, and then the servo motor 25 is controlled to start rotating alternately in positive and negative directions, so that it controls the support rod 31 to drive the connecting column 34 to reciprocate left and right, and at the same time, the driving device 33 is started to drive the grinding wheel 357 to rotate, and then the weight is placed in the load-bearing basket 323, so that it descends under the action of the weight, and the adjusting rod 321 is driven to move in the direction of the valve body 5 by the wire rope 325. At this time, the adjusting rod 321 is driven by the transmission The rod 326 drives the connecting plate 351 to move synchronously. As the connecting plate 351 moves to the left, it drives the connecting block 355 and one end of the hinged V-shaped rod 354 to move to the left through the connecting rod 352, so that the other end of the V-shaped rod 354 drives the grinding wheel 357 and the ball 358 to open and contact the inner surface of the valve body 5. At this time, as the grinding mechanism 3 moves left and right, the grinding wheel 357 drives the rotation and the valve body 5 rotates, the grinding wheel 357 starts to grind the inner surface of the valve body 5. The wheel 357 and the ball 358 are opened or closed synchronously. When the grinding wheel 357 grinds to the outlet of the valve stem on the valve body 5, the ball 358 contacts the inner surface of the valve body 5, and the grinding wheel 357 does not extend into the outlet of the valve stem, thereby ensuring the consistency of grinding and avoiding uneven grinding or excessive grinding. At the same time, the friction between the grinding wheel 357 and the inner surface of the valve body 5 can be changed by increasing or decreasing the weight of the weight, thereby controlling the degree of grinding.

[0036] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A surface treatment device for high-pressure valve casting production, comprising a seat body (1) and a control component (2) mounted on one side of the top thereof, characterized in that: It also includes a grinding mechanism (3) and a fixing mechanism (4) installed on the other side of the top of the base (1) and used to clamp the casting, and the control component (2) is used to control the grinding mechanism (3) to move left and right to grind the inner surface of the casting; The grinding mechanism (3) comprises a support rod (31), an adjustment assembly (32), a driving device (33), a connecting column (34), a connecting plate (351), a fixing rod (353) and a V-shaped rod (354). One end of the support rod (31) is slidably sleeved on the control assembly (2), and the other end is fixed to the connecting column (34). A hollow cavity is provided in the connecting column (34) for the connecting plate (351) to slide. A plurality of connecting rods (352) are installed on one side of the connecting plate (351) away from the support rod (31). The connecting rods (352) ) slides through the connecting column (34) and is hinged with a connecting block (355), one end of the V-shaped rod (354) is hinged with the connecting block (355), and the other end is fixedly installed with a U-shaped plate (356), the bending part of which is hinged with a fixed rod (353) fixed to the connecting column (34), a grinding wheel (357) is hinged on one U-shaped plate (356), and the other is hinged with a ball bearing (358), the adjustment component (32) adjusts the position of the connecting plate (351), and the driving device (33) drives the grinding wheel (357) to rotate.

2. A surface treatment device for high pressure valve casting production according to claim 1, characterized in that: The adjustment assembly (32) comprises an adjustment rod (321), a guide rail (322), a load-bearing basket (323), two pulleys (324), a wire rope (325) and a transmission rod (326); the adjustment rod (321) is slidably sleeved on the support rod (31); the guide rail (322) is mounted on one end of the control assembly (2) close to the fixing mechanism (4); the load-bearing basket (323) slides up and down along the guide rail (322); a pulley (324) is arranged in the air on the load-bearing basket (323); The adjusting rod (321) is provided above the adjusting rod (323) and is fixedly connected to the control assembly (2), another pulley (324) is fixedly installed at the middle part below the adjusting rod (321), one end of the steel wire rope (325) is fixedly connected to one end of the adjusting rod (321) close to the control assembly (2), and the other end is connected to the load-bearing basket (323) after being guided by the pulley (324), and the transmission rod (326) is installed between the adjusting rod (321) and the connecting plate (351) and slides through the connecting column (34).

3. The surface treatment device for high pressure valve casting production according to claim 1 is characterized in that: The driving device (33) comprises a motor mounted on the support rod (31), and a transmission member is connected between the output shaft of the motor and the rotating shaft of the grinding wheel (357).

4. The surface treatment device for high pressure valve casting production according to claim 1 is characterized in that: The fixing mechanism (4) comprises two fixing components and a clamping ring (44) arranged in parallel, wherein the fixing component comprises a lower fixing part (41) and an upper fixing part (42), one side of the lower fixing part (41) and the upper fixing part (42) being hinged to achieve flexible opening and closing, and the other side being provided with a locking part to ensure stability during tightening, the fixing component is provided with fixing holes (43) and symmetrically distributed on the lower fixing part (41) and the upper fixing part (42), the inner wall of the fixing hole (43) is provided with a fixing groove (431) for rotatably sleeved on the clamping ring (44), the clamping ring (44) is composed of two symmetrical semicircular rings, which form a complete circular ring structure after assembly, and the inner ring wall thereof is provided with a clamping groove (45) for mounting a workpiece.

5. The surface treatment device for high pressure valve casting production according to claim 4 is characterized in that: The inner ring walls of the two semicircular rings are provided with limit sliding grooves (46) along their radial direction. The fixing mechanism (4) further comprises a gear ring (47), a transmission shaft (48) and a driving assembly (49) for driving the gear ring (47) to rotate. The gear ring (47) is located between the two fixing assemblies and arranged parallel to the two fixing assemblies. Both sides of the inner wall of the gear ring (47) are provided with a V-shaped transmission shaft (48). The bending part of the transmission shaft (48) is fixedly connected to the gear ring (47). The two ends of the transmission shaft (48) are respectively slidably sleeved in the limit sliding grooves (46) on the clamping rings (44) in the two fixing assemblies.

6. A surface treatment device for high pressure valve casting production according to claim 5, characterized in that: The driving assembly (49) comprises a motor fixedly mounted on the top of the seat body (1), and a gear meshing with the ring gear (47) is mounted on the output shaft of the motor.

7. The surface treatment device for high pressure valve casting production according to claim 1 is characterized in that: The control assembly (2) comprises a housing (21) provided with a top of a seat body (1), a lead screw (23), a slider (24), a servo motor (25) and a transmission belt (26); a guide slot (22) for sleeve-connecting a support rod (31) is provided on one side of the top of the housing (21); a connecting slot (221) is provided between an inner top wall of the housing (21) and the guide slot (22); the lead screw (23) is rotatably mounted on the top of the inner wall of the housing (21) and its axial direction is the same as the moving direction of the support rod (31); the slider (24) is threadedly sleeved on the lead screw (23) and its top end slides through the connecting slot (221) to be fixedly connected to the support rod (31); the servo motor (25) is mounted in the housing (21), and its output shaft is transmission-connected to one end of the lead screw (23) via a transmission belt (26).

8. A surface treatment method for high-pressure valve casting production, characterized in that: The surface treatment device for producing high-pressure valve castings according to claim 1 is used, and the treatment method is as follows: The workpiece is fixed to the fixing mechanism (4) and driven to rotate. The grinding end of the grinding mechanism (3) is controlled to move to the inside of the workpiece through the control component (2) and to move the grinding end of the grinding mechanism (3) left and right inside the workpiece. The position of the connecting plate (351) is adjusted through the adjustment component (32) so that the grinding wheel (357) and the ball (358) can contact the inner surface of the workpiece. The grinding wheel (357) is driven to rotate through the driving device (33) to grind the inner surface of the workpiece.

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