Precision machining process and machining device for inner spherical surface of plug valve seat

Abstract

The invention discloses a plug valve seat inner spherical surface precision machining process and a machining device thereof, and belongs to the technical field of equipment manufacturing. A first motor drives a first gear and a gear ring to transmit, so that a feeding disc can drive a clamping driving assembly and a clamp assembly to rotate, the valve seat can keep rotating for feeding, and the requirement for automatic feeding is met; the multiple material clamping driving assemblies are arranged, so that the operation of clamping the valve seat at another position in the valve seat machining process can be conducted again, the situation that clamping is conducted after machining and dismantling is conducted is avoided, meanwhile, after machining is completed, the positions of the valve seat can be alternately switched again, and therefore continuous and efficient machining operation is met, and meanwhile feeding and discharging operation is facilitated; the material clamping driving assembly and the fourth gear are driven by the driving assembly to conduct transmission, the fourth gear is matched with the vibration assembly through the convex ball to achieve vibration operation of the material hopper, waste chips generated during machining can be smoothly discharged into the discharging assembly through the material hopper and directly discharged, and therefore the waste chips can be conveniently cleared away.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of equipment manufacturing, and in particular to a valve seat inner spherical surface precision machining process and machining device of a plug valve. BACKGROUND

[0002] The precision machining of the valve seat inner spherical surface of the plug valve is a complex and delicate process challenge. The high-precision machining link is the cornerstone of the outstanding precision of the valve seat inner spherical surface. This key link generally relies on high-precision lathes or special machines designed for this purpose to perform. In the entire machining process, strict control measures need to be implemented for the accurate regulation of cutting parameters, the reasonable selection of tools, and the proper use of cooling liquid, etc., to ensure that the machining precision and surface quality ultimately achieved can meet the stringent standard requirements.

[0003] Currently, the existing technical machine tool applied to the machining of the valve seat inner spherical surface of the plug valve generally uses a three-jaw chuck as a means of clamping and fixing the plug valve seat. However, given the hollow structure design of the plug valve seat, this clamping method faces significant challenges: if the clamping force of the three-jaw chuck is set too light, it is difficult to ensure the stability of the valve seat; on the contrary, if the clamping force is too large, it is easy to cause the valve seat surface to appear concave deformation, thereby damaging the product quality. In addition, the machine tool needs to be paused during the feeding and discharging link, which undoubtedly reduces the overall machining efficiency. More troublesome is that a large amount of debris is generated during the finishing stage, and the accumulation of these debris not only makes cleaning difficult, but often requires the machine tool to be stopped for thorough removal, which undoubtedly further slows down the machining progress and poses a considerable obstacle to production speed.

[0004] In view of the above problems, the present application file proposes a valve seat inner spherical surface precision machining process and machining device of a plug valve. SUMMARY

[0005] The purpose of the present application is to solve the shortcomings in the prior art that the three-jaw chuck is generally used as a means of clamping and fixing the plug valve seat, and if the clamping force of the three-jaw chuck is set too light, it is difficult to ensure the stability of the valve seat; on the contrary, if the clamping force is too large, it is easy to cause the valve seat surface to appear concave deformation, thereby damaging the product quality. In addition, the machine tool needs to be paused during the feeding and discharging link, which undoubtedly reduces the overall machining efficiency. More troublesome is that a large amount of debris is generated during the finishing stage, and the accumulation of these debris not only makes cleaning difficult, but often requires the machine tool to be stopped for thorough removal, which undoubtedly further slows down the machining progress and poses a considerable obstacle to production speed, and proposes a valve seat inner spherical surface precision machining process and machining device of a plug valve.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions: A valve seat inner spherical surface precision machining process of a plug valve, the machining process comprising the following steps: S1, the cooperation of the clamp assembly and the clamp driving assembly realizes the clamping operation of the valve seat inside and outside; S2, the cooperation of the driving assembly and the clamp driving assembly drives the valve seat to rotate, and then the grinding operation of the valve seat is realized by cooperating with the tool table structure; S3, the cooperation of the clamp driving assembly and the vibration assembly drives the material hopper to vibrate to discharge the waste.

[0007] A kind of processing device for the precision machining process of the inner spherical surface of a plug valve seat, the processing device includes a numerical control lathe, the numerical control lathe is provided with processing assembly and feeding mechanism; The feeding mechanism includes a switching type feeding assembly, the switching type feeding assembly is provided with a driving assembly and a plurality of adjustable guide assemblies on one side, the plurality of adjustable guide assemblies are connected by two circular strips, and the two circular strips are transversely provided with a discharging assembly; The switching type feeding assembly is provided with a plurality of clamp driving assemblies, when the clamp driving assemblies rotate circumferentially, the clamp driving assemblies are connected with the driving assembly, one side of the clamp driving assembly is provided with three clamp assemblies, the three clamp assemblies clamp and fix the valve seat, the clamp driving assembly is connected with the vibration assembly, and the two ends of the vibration assembly are connected with the two adjustable guide assemblies.

[0008] Preferably, the processing assembly includes a tool table structure, the tool table structure is arranged in the numerical control lathe, a tool table clamp is mounted on one side of the tool table structure, an electric spindle is fixedly mounted on one side of the tool table clamp, and a grinding head is mounted at one end of the electric spindle.

[0009] Preferably, the switching type feeding assembly includes a feeding disc, the feeding disc is fixedly connected with one of the circular strips, an annular ring is fixedly connected on one side of the feeding disc, a gear ring is fixedly connected in the annular ring, the gear ring is engaged with a first gear, and the first gear is fixedly connected with the output shaft of a first motor.

[0010] Preferably, the discharging assembly includes a conveying pipe, the feeding disc is rotatably installed on the conveying pipe through a bearing, the inner wall bottom of the conveying pipe is inclinedly arranged, a discharging pipe is communicated with one end of the conveying pipe, the discharging pipe is arranged to extend to the rear of the numerical control lathe from the numerical control lathe; A feeding port is arranged above the conveying pipe, a fixed plate is fixedly connected with the other end of the conveying pipe, the fixed plate is fixedly connected in the numerical control lathe, and the first motor is fixedly connected above the fixed plate.

[0011] Preferably, the adjustable guide assembly includes a connecting plate, the connecting plate is fixedly connected on the two circular strips, two sliding grooves are formed on the two sides of the connecting plate, a sliding block is slidably connected in each sliding groove, and a material hopper is fixedly connected on one side of the two sliding blocks.

[0012] Preferably, the vibration assembly comprises a connecting frame and a rotating shaft, a plurality of balls arranged in a circle are fixedly connected to one side of the connecting frame, two ends of the connecting frame are fixedly connected with two oppositely arranged material hoppers, the rotating shaft penetrates through the connecting frame and is rotatably installed on the feeding disc through a bearing, one end of the rotating shaft is fixedly connected with a fourth gear, a plurality of convex balls with the same arrangement as the balls are fixedly connected to one side of the fourth gear, and two second springs are fixedly connected between the connecting frame and the feeding disc.

[0013] Preferably, the material clamping driving assembly comprises a supporting shaft, the supporting shaft is rotatably installed on the feeding disc through a bearing, one end of the supporting shaft is fixedly connected with a three-jaw chuck, the three-jaw chuck is fixedly connected with a third gear outside, and the third gear is engaged with the fourth gear.

[0014] Preferably, the driving assembly comprises an electric push rod, the electric push rod is fixedly installed on the top wall of the numerical control lathe, the bottom end of the electric push rod is fixedly connected with a second motor, the output shaft of the second motor is fixedly connected with a second gear, and the second gear is engaged with the third gear.

[0015] Preferably, the clamp assembly comprises a support, one side of the support is fixedly connected to a clamping jaw of the three-jaw chuck, a connecting pipe is installed through the support, two ends of the support are fixedly connected with circular shells, the two circular shells are different in size, the two circular shells are communicated through the connecting pipe, a piston rod is arranged in the circular shell, the piston rod extends out of the circular shell and is fixedly connected with a clamping plate, one of the piston rods is fixedly connected with a first spring, and one end of the first spring is fixedly connected with the inner wall of the circular shell.

[0016] Compared with the prior art, the present application provides a plug valve seat inner spherical surface precision machining process and a machining device thereof, which has the following beneficial effects: 1、The plug valve seat inner spherical surface precision machining process and the machining device thereof, by the first motor driving the first gear and the gear ring transmission, the feeding disc can drive the material clamping driving assembly and the clamp assembly to rotate, so that the valve seat can be kept rotating for feeding, meeting the demand of automatic feeding, and the material clamping driving assembly is provided with a plurality of clamping driving assemblies, so that the valve seat can be clamped again at another position during the machining process, avoiding the need to remove and clamp the valve seat after machining, and the position of the valve seat can be alternately switched after machining, so that continuous and efficient machining operation is realized, and the feeding and discharging operation is facilitated, secondly, the driving assembly drives the material clamping driving assembly and the fourth gear transmission, so that the fourth gear drives the convex balls and the balls to produce extrusion movement, and the second spring is used to realize the vibration operation of the material hopper, so that the waste generated during machining can be smoothly discharged to the discharging assembly through the material hopper and directly discharged, thereby facilitating the cleaning of the waste.

[0017] 2. The ball valve seat inner spherical surface precision machining process and its machining device, through the three-jaw chuck driving the clamp jaw movement, the clamp jaw driving the support movement, the clamp plate can be attached to the valve seat, the clamp plate can be tightened to extrude the piston rod movement, the piston rod can drive another piston rod and the clamp plate movement through the liquid, due to the size difference of the two circular shells, the movement stroke of the two piston rods is different, so that the two clamp plates can be smoothly clamped on the inner and outer surfaces of the valve seat, the inner and outer surfaces of the valve seat are stressed, the uniformity of the stress can be maintained, the deformation of the valve seat is prevented, and thus the machining precision and product quality are improved.

[0018] 3. The ball valve seat inner spherical surface precision machining process and its machining device, through the three-jaw chuck driving the clamp jaw movement, the clamp jaw driving the support movement, the clamp plate can be attached to the valve seat, the clamp plate can be tightened to extrude the piston rod movement, the piston rod can drive another piston rod and the clamp plate movement through the liquid, due to the size difference of the two circular shells, the movement stroke of the two piston rods is different, so that the two clamp plates can be smoothly clamped on the inner and outer surfaces of the valve seat, the inner and outer surfaces of the valve seat are stressed, the uniformity of the stress can be maintained, the deformation of the valve seat is prevented, and thus the machining precision and product quality are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A perspective view of a ball valve seat inner spherical surface precision machining device is provided for the present application; Figure 2 A structure view of the discharge pipe of the ball valve seat inner spherical surface precision machining device penetrating the numerical control lathe is provided for the present application; Figure 3 A perspective view of the machining assembly and the feeding mechanism of the ball valve seat inner spherical surface precision machining device is provided for the present application; Figure 4 A structure view of the discharge assembly and the switching type feeding assembly connected of the ball valve seat inner spherical surface precision machining device is provided for the present application; Figure 5 A perspective view of the switching type feeding assembly of the ball valve seat inner spherical surface precision machining device is provided for the present application; Figure 6 A perspective view of the discharge assembly of the ball valve seat inner spherical surface precision machining device is provided for the present application; Figure 7 A perspective view of the adjustable material guiding assembly of the ball valve seat inner spherical surface precision machining device is provided for the present application; Figure 8 A structure view of the adjustable material guiding assembly and the ring strip connected of the ball valve seat inner spherical surface precision machining device is provided for the present application; Figure 9The structure view of the vibration assembly connected with the feeding disc of the ball face precision machining device in the valve seat of the cock valve is provided in the application. Figure 10 The enlarged view of A in the application Figure 9 Figure 11 The structure view of the clamp driving assembly connected with the clamp assembly of the ball face precision machining device in the valve seat of the cock valve is provided in the application. Figure 12 The three-dimensional view of the clamp assembly of the ball face precision machining device in the valve seat of the cock valve is provided in the application. Figure 13 The three-dimensional view of the clamp assembly of the ball face precision machining device in the valve seat of the cock valve is provided in the application.

[0020] In the figure: 100, numerical control lathe; 101, machining assembly; 1011, grinding head; 1012, electric spindle; 1013, tool rest clamp; 1014, tool rest structure; 200, feeding mechanism; 201, switching type feeding assembly; 2011, feeding disc; 2012, gear ring; 2013, first motor; 2014, annular ring; 2015, first gear; 202, discharging assembly; 2021, discharging pipe; 2022, feeding pipe; 2023, feeding port; 2024, fixed plate; 203, driving assembly; 2031, second gear; 2032, second motor; 2033, electric push rod; 204, valve seat; 205, clamp assembly; 2051, support; 2052, circular shell; 2053, piston rod; 2054, clamping plate; 2055, first spring; 2056, connecting pipe; 206, adjustable guide assembly; 2061, material hopper; 2062, connecting plate; 2063, chute; 2064, sliding block; 207, vibration assembly; 2071, connecting frame; 2072, ball bearing; 2073, second spring; 2074, convex ball; 2075, rotating shaft; 2076, fourth gear; 208, circular ring strip; 209, clamp driving assembly; 2091, three-jaw chuck; 2092, third gear; 2093, support shaft. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments of the application.

[0022] ​In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0023] Embodiment 1: Reference Figures 1-11 A machining device for machining the inner spherical surface precision of a plug valve seat, the machining device comprising a numerical control lathe 100, a gas pump source is added to the numerical control lathe 100, which can be used for reverse osmosis at the end of an electric spindle 1012 to prevent water from entering the electric spindle 1012, a machining assembly 101 and a feeding mechanism 200 are arranged in the numerical control lathe 100, the machining assembly 101 comprises a tool rest structure 1014, the tool rest structure 1014 is arranged in the numerical control lathe 100, a tool rest clamp 1013 is mounted on one side of the tool rest structure 1014, an electric spindle 1012 is fixedly mounted on one side of the tool rest clamp 1013, a frequency converter is provided on the electric spindle 1012, so that the purpose of frequency conversion and speed regulation of the electric spindle 1012 can be achieved, secondly, a water cooling circulation system is additionally arranged on the electric spindle 1012 for cooling, a grinding head 1011 is mounted on one end of the electric spindle 1012, the grinding head 1011 is made of white corundum material with a particle size of F46, and the grinding wheel has sharp cutting edges for grinding; The feeding mechanism 200 includes a switching feeding assembly 201, which includes a feeding disc 2011. The feeding disc 2011 is fixedly connected to one of the circular bars 208. An annular ring 2014 is fixedly connected to one side of the feeding disc 2011. A gear ring 2012 is fixedly connected to the annular ring 2014, and the gear ring 2012 meshes with a first gear 2015. The first gear 2015 is fixedly connected to the output shaft of a first motor 2013. The first motor 2013 drives the first gear 2015 and the gear ring 2012 to drive the annular ring 2014 to rotate the clamping drive assembly 209 through the feeding disc 2011. This allows the position of valve seat 204 to be switched, enabling continuous processing. A drive assembly 203 and multiple adjustable guide assemblies 206 are provided on one side of the switching feeding assembly 201. Each adjustable guide assembly 206 includes a connecting plate 2062, which is fixedly connected to two annular bars 208. Two sliding grooves 2063 are provided on both sides of the connecting plate 2062, and sliders 2064 are slidably connected within these grooves. The sliders 2064 can slide within the grooves 2063, allowing the material hopper 2061 to vibrate smoothly. The material hopper 2061 is fixedly connected to one side of each slider 2064. The material hopper 2061 prevents waste from splashing outwards, and its oblique arrangement allows waste to be discharged smoothly downwards. Multiple adjustable guide components 206 are connected by two circular rings 208, through which a discharge component 202 passes. The discharge component 202 includes a conveying pipe 2022, and a feeding disc 2011 is rotatably mounted on the conveying pipe 2022 via bearings. The feeding disc 2011 can rotate smoothly via the bearings. The bottom of the inner wall of the conveying pipe 2022 is inclined, and one end of the conveying pipe 2022 is connected to a discharge pipe 2021. The discharge pipe 2021 exits from the CNC lathe 100 and extends... At the rear of the CNC lathe 100, a feed inlet 2023 is provided above the feed pipe 2022. Due to the feed inlet 2023, waste chips can enter the feed pipe 2022 through the feed inlet 2023. Secondly, due to the inclined bottom wall of the feed pipe 2022, the waste chips can smoothly enter the discharge pipe 2021 along the feed pipe 2022 and be discharged through the discharge pipe 2021, which facilitates the centralized collection of waste chips. A fixing plate 2024 is fixedly connected to the other end of the feed pipe 2022. The fixing plate 2024 is fixedly connected in the CNC lathe 100, and the top of the fixing plate 2024 is fixedly connected to the first motor 2013. The switching feeding assembly 201 is equipped with multiple clamping drive assemblies 209. Each clamping drive assembly 209 includes a support shaft 2093, which is rotatably mounted on the feeding disc 2011 via bearings. The support shaft 2093 can rotate smoothly via the bearings, allowing the three-jaw chuck 2091 to rotate smoothly. One end of the support shaft 2093 is fixedly connected to the three-jaw chuck 2091, and a third gear 2092 is fixedly connected to the outside of the three-jaw chuck 2091. The third gear 2092 meshes with a fourth gear 2076. Power transmission is achieved through the transmission between the third gear 2092 and the fourth gear 2076, enabling the fourth gear 2076 to drive the convex ball 2074 and the rolling ball 2072 to generate a squeezing motion. This motion is then carried through the connecting frame 2071. The animal hopper 2061 is movable, facilitating the downward discharge of waste. When the clamping drive assembly 209 rotates, it establishes a transmission connection with the drive assembly 203. The drive assembly 203 includes an electric push rod 2033, which is fixedly mounted on the top wall of the CNC lathe 100. A second motor 2032 is fixedly connected to the bottom end of the electric push rod 2033. The electric push rod 2033 can raise the position of the second motor 2032, preventing the second gear 2031 from obstructing the rotation of the hopper 2061. Simultaneously, the electric push rod 2033 pushes down the second motor 2032, allowing the second gear 2031 to smoothly mesh with the third gear 2092, thereby enabling the three-jaw chuck 2091 to pass through the clamping assembly 205. The valve seat 204 is rotated to perform the processing operation. The output shaft of the second motor 2032 is fixedly connected to the second gear 2031, which meshes with the third gear 2092. Three clamping assemblies 205 are provided on one side of the clamping drive assembly 209, which clamp and fix the valve seat 204. The clamping drive assembly 209 is connected to the vibration assembly 207. The vibration assembly 207 includes a connecting frame 2071 and a rotating shaft 2075. A plurality of circumferentially arranged balls 2072 are fixedly connected to one side of the connecting frame 2071. The circumferential arrangement of the balls 2072 is the same as that of the convex balls 2074, so that the rotation of the convex balls 2074 can smoothly correspond to the balls 2072, thereby generating a contact between the convex balls 2074 and the balls 2072. The extrusion motion involves two ends of the connecting frame 2071 fixedly connected to two oppositely positioned material hoppers 2061. A rotating shaft 2075 extends through the connecting frame 2071 and is rotatably mounted on the feeding disc 2011 via bearings. The rotating shaft 2075 can rotate smoothly via the bearings, allowing the fourth gear 2076 to rotate stably. One end of the rotating shaft 2075 is fixedly connected to the fourth gear 2076, and one side of the fourth gear 2076 is fixedly connected to multiple convex balls 2074 arranged in the same pattern as the ball bearings 2072. Two second springs 2073 are fixedly connected between the connecting frame 2071 and the feeding disc 2011. When the convex balls 2074 and the ball bearings 2072 are compressed, the connecting frame 2071 compresses the second springs 2073.When the convex ball 2074 separates from the ball bearing 2072, the second spring 2073 drives the connecting frame 2071 to reset. This allows the convex ball 2074 and ball bearing 2072, in conjunction with the second spring 2073, to vibrate the material hopper 2061, enabling waste to be discharged smoothly downwards. Both ends of the vibration assembly 207 are connected to two adjustable guide assemblies 206.

[0024] In this embodiment: the first motor 2013 drives the first gear 2015 and the gear ring 2012 to transmit power, so that the feeding disc 2011 can drive the clamping drive assembly 209 and the clamping assembly 205 to rotate, so that the valve seat 204 can be kept rotating for feeding, meeting the requirements of automatic feeding. Moreover, multiple clamping drive assemblies 209 are provided, so that the valve seat 204 can be clamped again in another position during the processing of the valve seat 204, avoiding the need to remove and clamp after processing. At the same time, after processing is completed, the position of the valve seat 204 can be switched alternately again, thereby meeting the requirements of automatic feeding. It enables continuous and efficient processing while facilitating loading and unloading. Secondly, the second motor 2032 drives the second gear 2031 and the third gear 2092 to drive the third gear 2092 and the fourth gear 2076. The fourth gear 2076 drives the convex ball 2074 and the ball 2072 to generate a squeezing motion. This, combined with the second spring 2073, achieves the vibration operation of the material hopper 2061, allowing the waste generated during processing to be smoothly discharged into the discharge assembly 202 through the material hopper 2061 and directly discharged, thus facilitating the cleaning of waste.

[0025] Example 2: Refer to Figures 8-9 and Figures 11-13 The clamping drive assembly 209 includes a support shaft 2093, which is rotatably mounted on the feed plate 2011 via bearings. One end of the support shaft 2093 is fixedly connected to a three-jaw chuck 2091, and a third gear 2092 is fixedly connected to the outside of the three-jaw chuck 2091. The third gear 2092 meshes with a fourth gear 2076. The clamp assembly 205 includes a bracket 2051, one side of which is fixedly connected to the jaws of a three-jaw chuck 2091. A connecting pipe 2056 is installed through the bracket 2051, allowing two circular shells 2052 to be connected, thus ensuring smooth liquid delivery. Circular shells 2052 are fixedly connected to both ends of the bracket 2051. The two circular shells 2052 are of different sizes. Due to the difference in size, when the clamping plate 2054 is pressed against the valve seat 204, the two pistons... The different speeds of the rods 2053 allow the two clamping plates 2054 to be smoothly clamped on both the inner and outer sides of the valve seat 204, maintaining the stability of the valve seat 204. The two circular shells 2052 are connected by a connecting pipe 2056. A piston rod 2053 is provided inside the circular shell 2052. The piston rod 2053 extends out of the circular shell 2052 and is fixedly connected to the clamping plate 2054. One of the piston rods 2053 is fixedly connected to the first spring 2055. One end of the first spring 2055 is fixedly connected to the inner wall of the circular shell 2052.

[0026] In this embodiment: the three-jaw chuck 2091 drives the jaws to move, which in turn drives the bracket 2051 to move, allowing the clamping plate 2054 to fit against the valve seat 204. The clamping plate 2054 tightens, squeezing the piston rod 2053 to move. The piston rod 2053 can then drive another piston rod 2053 and the clamping plate 2054 to move via liquid. Because the two circular shells 2052 are of different sizes, the two piston rods 2053 move at different speeds. This ensures that the two clamping plates 2054 are smoothly clamped on the inner and outer surfaces of the valve seat 204, so that the inner and outer surfaces of the valve seat 204 are subjected to force. This maintains uniform force distribution, prevents deformation of the valve seat 204, and thus improves processing accuracy and product quality.

[0027] Example 3: Reference Figure 1 , Figure 4 and Figures 7-8 The feeding mechanism 200 includes a switching feeding component 201. A drive component 203 and multiple adjustable guide components 206 are provided on one side of the switching feeding component 201. The multiple adjustable guide components 206 are connected by two circular bars 208. A discharge component 202 passes through the two circular bars 208. Multiple clamping drive components 209 are provided on the switching feeding component 201. When the clamping drive components 209 move in a circular motion, the clamping drive components 209 are connected to the drive component 203 in a transmission connection. Three clamping components 205 are provided on one side of the clamping drive components 209. The three clamping components 205 clamp and fix the valve seat 204.

[0028] In this embodiment: the clamping drive assembly 209 drives the clamping assembly 205 to merge, so that the clamping assembly 205 can be tightened on both the inner and outer sides of the valve seat 204 to maintain the clamping of the valve seat 204. This method can provide greater clamping force and enhance the stability of the valve seat 204, maintaining a stable position and posture during processing. Secondly, multiple adjustable guide assemblies 206 can separate the clamping drive assembly 203 individually, so that each valve seat 204 maintains an individual processing area. The separation method avoids the splashing of waste chips that may injure people. At the same time, the separation can also prevent the valve seat 204 from loosening and being thrown out, thus greatly improving the safety of loading and unloading when combined with double-sided clamping.

[0029] A precision machining process for the inner spherical surface of a plug valve seat, comprising the following steps: S1. During the grinding process, the valve seat 204 is placed between two clamping plates 2054. Then, the three-jaw chuck 2091 drives multiple supports 2051 to merge with each other, so that the clamping plates 2054 fit against the valve seat 204. The clamping plates 2054 drive the piston rod 2053 to move, so that the piston rod 2053 inputs liquid into another circular shell 2052. At this time, the valve seat 204 is clamped inside and outside by hydraulic pressure. S2. Then, the first gear 2015 and the gear ring 2012 are driven by the first motor 2013. The gear ring 2012 drives the ring ring 2014 and the feed plate 2011 to rotate. The feed plate 2011 drives the clamping drive assembly 209 and the clamping assembly 205 to move, so that the valve seat 204 corresponds to the grinding head 1011. S3. After the valve seat 204 aligns with the grinding head 1011, the CNC lathe 100 controls the machining assembly 101 to move in translation. After the grinding head 1011 contacts the valve seat 204, the electric spindle 1012 drives the grinding head 1011 to grind the valve seat 204. At the same time, the electric push rod 2033 pushes down the second motor 2032, so that the second gear 2031 meshes with the third gear 2092. The second motor 2032 drives the second gear 2031 and the third gear 2092 to transmit power, so that the three-jaw chuck 2091 drives the valve seat 204 to rotate through the clamping assembly 205 to perform grinding operations. S4. The movement of the third gear 2092 causes the third gear 2092 to drive the fourth gear 2076. The fourth gear 2076 drives the cam ball 2074 and the ball 2072 to generate a squeezing motion, which, together with the second spring 2073, makes the connecting frame 2071 and the material hopper 2061 vibrate. At this time, the waste generated by the processing of the valve seat 204 smoothly enters the material conveying pipe 2022 through the material hopper 2061 and is discharged through the discharge pipe 2021 along the conveying pipe 2022. S5. After the valve seat 204 is processed, the processing component 101 is reset, and the drive component 203 is reset upward. At this time, the switching feeding component 201 drives the valve seat 204 to rotate and leave the processing area again. Then, the clamping component 205 is separated by the three-jaw chuck 2091, so that the valve seat 204 can be successfully removed and the material removal operation can be completed.

[0030] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A precision machining process for the inner spherical surface of a plug valve seat, characterized in that, The processing technology includes the following steps: S1. The clamping operation of the valve seat (204) is realized by the clamping drive assembly (209) in conjunction with the clamping assembly (205); S2. The valve seat (204) is rotated by the drive assembly (203) and the clamping drive assembly (209), and then the valve seat (204) is ground by the tool holder structure (1014). S3. The material hopper (2061) is vibrated by the clamping drive assembly (209) and the vibration assembly (207) to discharge the waste.

2. The machining apparatus used in the precision machining process of the inner spherical surface of the plug valve seat according to claim 1, characterized in that, The processing device includes a CNC lathe (100), in which a processing assembly (101) and a feeding mechanism (200) are provided. The feeding mechanism (200) includes a switching feeding assembly (201). A driving assembly (203) and multiple adjustable guiding assemblies (206) are provided on one side of the switching feeding assembly (201). The multiple adjustable guiding assemblies (206) are connected by two circular bars (208). A discharge assembly (202) passes through the two circular bars (208). The switching feeding assembly (201) is provided with multiple clamping drive assemblies (209). When the clamping drive assembly (209) moves in a circular motion, the clamping drive assembly (209) is connected to the drive assembly (203) in a transmission connection. Three clamping assemblies (205) are provided on one side of the clamping drive assembly (209). The three clamping assemblies (205) clamp and fix the valve seat (204). The clamping drive assembly (209) is connected to the vibration assembly (207) in a transmission connection. The two ends of the vibration assembly (207) are connected to two adjustable guide assemblies (206).

3. The processing apparatus according to claim 2, characterized in that, The machining assembly (101) includes a tool holder structure (1014), which is disposed in a CNC lathe (100). A tool holder fixture (1013) is mounted on one side of the tool holder structure (1014), and an electric spindle (1012) is fixedly mounted on one side of the tool holder fixture (1013). A grinding head (1011) is mounted on one end of the electric spindle (1012).

4. The processing apparatus according to claim 2, characterized in that, The switching feeding assembly (201) includes a feeding disc (2011), which is fixedly connected to one of the circular bars (208). An annular ring (2014) is fixedly connected to one side of the feeding disc (2011), and a gear ring (2012) is fixedly connected in the annular ring (2014). The gear ring (2012) meshes with a first gear (2015), and the first gear (2015) is fixedly connected to the output shaft of a first motor (2013).

5. The processing apparatus according to claim 4, characterized in that, The discharge assembly (202) includes a conveying pipe (2022), and the feeding disc (2011) is rotatably mounted on the conveying pipe (2022) via a bearing. The bottom of the inner wall of the conveying pipe (2022) is inclined. One end of the conveying pipe (2022) is connected to a discharge pipe (2021). The discharge pipe (2021) passes through the CNC lathe (100) and extends to the rear of the CNC lathe (100). The feed pipe (2022) is provided with a feed inlet (2023) at its top. The other end of the feed pipe (2022) is fixedly connected to a fixing plate (2024). The fixing plate (2024) is fixedly connected in the CNC lathe (100). The top of the fixing plate (2024) is fixedly connected to the first motor (2013).

6. The processing apparatus according to claim 4, characterized in that, The adjustable material guiding assembly (206) includes a connecting plate (2062), which is fixedly connected to two circular bars (208). Two sliding grooves (2063) are provided on both sides of the connecting plate (2062), and sliders (2064) are slidably connected in the sliding grooves (2063). A material hopper (2061) is fixedly connected to one side of the two sliders (2064).

7. The processing apparatus according to claim 6, characterized in that, The vibration assembly (207) includes a connecting frame (2071) and a rotating shaft (2075). A plurality of circumferentially arranged ball bearings (2072) are fixedly connected to one side of the connecting frame (2071). The two ends of the connecting frame (2071) are respectively fixedly connected to two oppositely arranged material hoppers (2061). The rotating shaft (2075) passes through the connecting frame (2071) and is rotatably mounted on the feeding disc (2011) by bearings. A fourth gear (2076) is fixedly connected to one end of the rotating shaft (2075). A plurality of convex balls (2074) with the same arrangement as the ball bearings (2072) are fixedly connected to one side of the fourth gear (2076). Two second springs (2073) are fixedly connected between the connecting frame (2071) and the feeding disc (2011).

8. The processing apparatus according to claim 7, characterized in that, The clamping drive assembly (209) includes a support shaft (2093), which is rotatably mounted on the feed plate (2011) via bearings. One end of the support shaft (2093) is fixedly connected to a three-jaw chuck (2091), and a third gear (2092) is fixedly connected to the outside of the three-jaw chuck (2091). The third gear (2092) meshes with a fourth gear (2076).

9. The processing apparatus according to claim 8, characterized in that, The drive assembly (203) includes an electric push rod (2033), which is fixedly installed on the top wall of the CNC lathe (100). A second motor (2032) is fixedly connected to the bottom end of the electric push rod (2033). A second gear (2031) is fixedly connected to the output shaft of the second motor (2032). The second gear (2031) meshes with a third gear (2092).

10. The processing apparatus according to claim 8, characterized in that, The clamp assembly (205) includes a bracket (2051), one side of which is fixedly connected to the jaws of a three-jaw chuck (2091). A connecting pipe (2056) is installed through the bracket (2051). Circular shells (2052) are fixedly connected to both ends of the bracket (2051). The two circular shells (2052) are of different sizes and are connected through the connecting pipe (2056). A piston rod (2053) is provided inside the circular shell (2052). The piston rod (2053) extends out of the circular shell (2052) and is fixedly connected to a clamping plate (2054). One of the piston rods (2053) is fixedly connected to a first spring (2055). One end of the first spring (2055) is fixedly connected to the inner wall of the circular shell (2052).

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