Combined machining positioning table of self-centering electric valve actuator

Abstract

The invention belongs to the technical field of electric valve actuator machining, and particularly relates to a combined machining positioning table of a self-centering electric valve actuator, which comprises a table body, a plurality of positioning guide rails are arranged on the upper surface of the table body, a clamping block is slidably connected in each positioning guide rail, a plurality of clamping blocks are distributed in a circumferential array, and a plurality of clamping blocks are arranged in the table body. A plurality of limiting assemblies are further arranged on the upper surface of the table body, each limiting assembly comprises a fixing groove formed in the upper surface of the table body, a fixing block is slidably connected into each fixing groove, each fixing block is fixedly connected with a clamping block, a rack plate is fixedly connected to one side of each fixing block and drives a driving part, and the driving part drives the table body. The driving part drives a rotating rod rotationally arranged on the upper surface of the table body, the top end of the rotating rod is rotationally connected with a connecting plate, the section of the connecting plate is in an L shape, and by arranging the limiting assembly, the problem that limiting is unstable in the machining process of the electrically operated valve actuator is solved.

Description

Technical Field

[0001] This invention belongs to the field of electric valve actuator processing technology, specifically a composite processing positioning table for a self-centering electric valve actuator. Background Technology

[0002] Electric valve actuators, as key components in industrial automation process control, are widely used in petroleum, chemical, and power industries. Their machining accuracy directly affects the accuracy and response speed of valve opening and closing. With the upgrading of industrial intelligence, the performance requirements for electric valve actuators are increasing, and high-precision, high-stability machining and positioning have become the foundation for ensuring their reliable operation.

[0003] A patent with publication number CN119910469A discloses an adjustable electric valve actuator processing and positioning device, including a base, a guide seat, an air distribution seat, and a positioning mechanism. The base is fixed on an adjustable electric valve actuator processing platform. The guide seats are arranged in groups, with three groups of guide seats evenly distributed around the circumference on the base, and guide grooves are formed between the guide seats in the same group. The air distribution seat is integrally formed with the base, and an air chamber is opened on the air distribution seat. An air pipe connector is provided on the side wall of the air chamber. The air pipe connector is connected to the air supply port of the air supply equipment through an air pipe. The positioning mechanism is used to position the actuator housing. By setting the positioning mechanism to be composed of an inner clamping seat, a movable seat, and an outer clamping seat, the inner and outer sides of the actuator housing are positioned simultaneously by the inner and outer clamping seats.

[0004] In the existing application of electric valve actuator machining and positioning devices, there is a significant deficiency in the positioning and clamping of straight-through electric valve actuators. During machining, straight-through electric valve actuators are usually only fixed at one end by a clamping device. After clamping is completed and the turning and grinding processes are started, the clamping device drives the actuator to rotate. At this time, the other end is in a relatively free state due to the lack of effective fixing measures. When the cutting tool performs turning operations on the actuator, and the grinding roller grinds its surface, the centrifugal force generated by the rotation of the actuator, combined with the external forces applied during turning and grinding, makes the unfixed end prone to swaying. This swaying not only seriously affects the machining accuracy, leading to problems such as turning dimensional deviations and substandard grinding surface roughness, thus reducing product quality, but also increases the safety risks during the machining process. The swaying actuator may collide with the machining equipment, damaging components such as cutting tools and grinding rollers, and even causing personal injury to operators, bringing many adverse effects to production.

[0005] Therefore, the present invention provides a composite machining positioning stage for a self-centering electric valve actuator. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A composite machining positioning table for a self-centering electric valve actuator, comprising a table body, a plurality of positioning guide rails provided on the upper surface of the table body, a clamping block slidably connected in each positioning guide rail, the plurality of clamping blocks being arranged in a circumferential array, a plurality of limiting components provided on the upper surface of the table body, each limiting component including a fixing groove provided on the upper surface of the table body, a fixing block slidably connected in the fixing groove, the fixing block being fixedly connected to the clamping block, a rack plate being fixedly connected to one side of the fixing block, the rack plate driving a driving member, the driving member driving a rotating rod rotatably disposed on the upper surface of the table body, a connecting plate being rotatably connected to the top end of the rotating rod, the connecting plate having an "L" shaped cross section, the connecting plate being used for secondary limiting of the electric valve actuator; An auxiliary plate is provided on the side of the rotating rod away from the connecting plate, and the auxiliary plate is used to limit the arc surface of the electric valve actuator.

[0008] Preferably, the driving component includes a positioning block fixed to the upper surface of the platform, a rotating shaft rotatably connected to the middle of the positioning block, a cam fixed to one end of the rotating shaft, the cam meshing with a rack plate, and a rotating rod fixed to the other end of the rotating shaft.

[0009] Preferably, the top end of the rotating rod is rotatably connected to a connecting shaft, one end of the connecting shaft is fixedly connected to a connecting plate, the other end of the connecting shaft is fixedly connected to an auxiliary plate, the top end of the auxiliary plate is fixedly connected to an auxiliary ring, and the connecting plate and the auxiliary plate are switched by a switching component provided on one side of the fixed plate.

[0010] Preferably, the switching component includes a fixed motor fixedly connected to a fixed side, a rotating disk fixedly connected to the output end of the fixed motor, and an auxiliary rod fixedly connected to one side of the rotating disk. The auxiliary rod is used to push the connecting plate and the auxiliary plate to perform switching operations.

[0011] Preferably, the top of the fixing plate is provided with a cleaning component, which is used to clean the auxiliary ring and remove metal debris from the surface of the auxiliary ring.

[0012] Preferably, the cleaning component includes a hydraulic cylinder fixed to the top of the fixed plate, and a rotating roller is fixed to the output end of the hydraulic cylinder. The circumferential surface of the rotating roller is provided with several brushes. When cleaning the auxiliary ring, the hydraulic cylinder is activated to bring the rotating roller close to the inner wall of the auxiliary ring, thereby cleaning the inner wall of the auxiliary ring.

[0013] Preferably, the connecting plate has a retaining element inside, the retaining element including a connecting groove inside the connecting plate, a sliding groove inside the connecting groove, a sliding block slidably connected in the sliding groove, a compression spring fixed between the sliding block and the sliding groove, a limit block fixed between two sliding blocks, a first cone block and a second cone block slidably connected in the connecting groove, and an auxiliary groove inside the connecting groove, a third cone block slidably connected in the auxiliary groove.

[0014] Preferably, when performing the positioning and clamping operation of the electric valve actuator, the electric valve actuator is placed in the middle of the platform, and each positioning guide rail is activated. The clamping blocks inside the positioning guide rail will slide along the positioning guide rail. The clamping blocks approach each other to clamp and fix the electric valve actuator. During the sliding of the clamping blocks, the fixing blocks will also slide. The sliding of the fixing blocks drives the rack plate to slide. The sliding of the rack plate drives the cam to rotate. The rotation of the cam drives the rotating rod to rotate, so that the connecting plate at the top of the rotating rod will lock onto the top of the electric valve actuator, thereby performing secondary limiting and fixing.

[0015] Preferably, during the process of the connecting plate rotating and engaging with the top of the electric valve actuator, the third cone block on one side of the connecting plate contacts the outer wall of the electric valve actuator. The third cone block is squeezed into the connecting groove, and during the process of retracting into the connecting groove, it squeezes the second cone block, causing the second cone block to slide in the connecting groove. Then, the second cone block squeezes the first cone block, and the first cone block slides after being squeezed, thereby squeezing one end of the limiting block, causing the limiting block to protrude out of the connecting groove. After the limiting block protrudes out of the connecting groove, it forms a concave end with the connecting plate, engaging with the top of the electric valve actuator, so that the turning tool can perform turning work on the pipe wall of the electric valve actuator. After the turning work is completed, during the retraction of the connecting plate, the compression springs on both sides of the limiting block rebound, driving the sliding block to reset along the sliding groove, thereby indirectly driving the third cone block to protrude again, completing the positioning work.

[0016] Preferably, when turning the end of the electric valve actuator, the fixed motor of the switching component is started. The start of the fixed motor drives the rotating disk to rotate. The rotation of the rotating disk drives the auxiliary rod to rotate. The rotation of the auxiliary rod drives the auxiliary plate to rotate upward. The rotation of the auxiliary plate drives the connecting shaft to rotate. The rotation of the connecting shaft drives the connecting plate to rotate downward, thereby completing the switching operation. Then, during the sliding of the clamping block, the rotating rod is driven to rotate, so that the auxiliary plate performs arc-shaped limiting work on the outer wall of the electric valve actuator, exposing the end of the electric valve actuator. The auxiliary cutting tool performs turning and grinding work on the end of the electric valve actuator. In addition, after the auxiliary ring completes the limiting work and resets, the hydraulic cylinder is started to drive the rotating roller to move downward, cleaning the steel chips adhering to the inner wall of the auxiliary ring.

[0017] The beneficial effects of this invention are as follows: 1. The composite machining positioning table for a self-centering electric valve actuator described in this invention achieves initial clamping and fixation of the electric valve actuator by bringing the clamping blocks closer together. Then, through a series of linkages, the connecting plate at the top of the rotating rod latches onto the top of the electric valve actuator for secondary limiting, which greatly improves the stability of positioning, effectively prevents the actuator from shaking during machining, and ensures turning accuracy. During the clamping process of the connecting plate, the linkage design of the cone block and the limiting block can more stably clamp and fix the electric valve actuator. After turning is completed, the compression spring helps each component to reset, so that the third cone block protrudes again, which is convenient for the next positioning. The overall structure is ingenious, improves machining efficiency and quality, and reduces operation difficulty and cost.

[0018] 2. The composite machining positioning table for a self-centering electric valve actuator described in this invention achieves switching through a series of linkages by starting a fixed motor. This allows the clamping block to slide and drive the rotating rod to rotate, causing the auxiliary plate to be arc-shapedly limited on the outer wall of the electric valve actuator, exposing the end. This creates conditions for turning and grinding with a cutting tool, greatly improving the accuracy and convenience of machining. Moreover, after the auxiliary ring completes its limiting and reset, a hydraulic cylinder drives the rotating roller to move down and clean the steel chips on its inner wall. This effectively avoids steel chip residue affecting the wear of the outer wall of the electric valve actuator during subsequent positioning, ensuring a clean machining environment and normal equipment operation. It improves the quality and efficiency of end machining of the electric valve actuator and enables switching between two different working conditions for positioning and clamping when machining the end and outer wall of the electric valve actuator. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the limiting component of the present invention; Figure 3 This is a schematic diagram of the structure of the driving component of the present invention; Figure 4 This is a schematic diagram of the switching component of the present invention; Figure 5 This is a cross-sectional view of the fastener of the present invention; Figure 6 This is a schematic diagram of the disassembled structure of the fastener of the present invention; In the diagram: 1. Platform; 2. Clamping block; 21. Positioning guide rail; 3. Fixing plate; 31. Fixing block; 32. Fixing groove; 33. Rack plate; 34. Positioning block; 35. Rotating shaft; 36. Cam; 37. Rotating rod; 38. Connecting shaft; 39. Connecting plate; 310. Connecting groove; 311. Sliding groove; 312. Limiting block; 313. Sliding block; 314. Compression spring; 315. First cone block; 316. Second cone block; 317. Auxiliary groove; 318. Third cone block; 4. Auxiliary plate; 41. Auxiliary ring; 42. Hydraulic cylinder; 43. Rotating roller; 44. Fixed motor; 45. Rotating disk; 46. Auxiliary rod. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1: As Figures 1 to 6 As shown in the embodiment of the present invention, a composite machining positioning table for a self-centering electric valve actuator has several positioning guide rails 21 on its upper surface. Each positioning guide rail 21 is slidably connected to a clamping block 2, and the clamping blocks 2 are arranged in a circular array. Several sets of limiting components are also provided on the upper surface of the table body 1. Each set of limiting components includes a fixing groove 32 on the upper surface of the table body 1. A fixing block 31 is slidably connected in the fixing groove 32. The fixing block 31 is fixed to the clamping block 2. A rack plate 33 is fixed to one side of the fixing block 31. The rack plate 33 drives a driving component, which drives a rotating rod 37 disposed on the upper surface of the table body 1. A connecting plate 39 is rotatably connected to the top of the rotating rod 37. The connecting plate 39 has an "L" shaped cross section and is used for secondary limiting of the electric valve actuator. An auxiliary plate 4 is provided on the side of the rotating rod 37 away from the connecting plate 39. The auxiliary plate 4 is used to limit the arc surface of the electric valve actuator; the driving component includes a positioning block 34 fixed to the upper surface of the platform 1, a rotating shaft 35 rotatably connected to the middle of the positioning block 34, a cam 36 fixed to one end of the rotating shaft 35, the cam 36 meshing with the rack plate 33, and a rotating rod 37 fixed to the other end of the rotating shaft 35; the connecting plate 39 is provided with a locking component, which includes a connecting groove 310 opened inside the connecting plate 39, a sliding groove 311 opened in the connecting groove 310, a sliding block 313 slidably connected in the sliding groove 311, a compression spring 314 fixed between the sliding block 313 and the sliding groove 311, a limit block 312 fixed between the two sliding blocks 313, a first cone block 315 and a second cone block 316 slidably connected in the connecting groove 310, an auxiliary groove 317 opened in the inner wall of the connecting groove 310, and a third cone block 318 slidably connected in the auxiliary groove 317.

[0023] Specifically, in the existing applications of electric valve actuator machining and positioning devices, there are obvious deficiencies in the positioning and clamping of straight-through electric valve actuators. During machining, straight-through electric valve actuators are usually only fixed at one end by a clamping device. After clamping is completed and the turning and grinding processes begin, the clamping device drives the actuator to rotate. At this time, the other end is in a relatively free state due to the lack of effective fixing measures. When the cutting tool performs turning operations on the actuator, and the grinding roller polishes its surface, the centrifugal force generated by the actuator's rotation, combined with the external forces applied during turning and polishing, can easily cause the unfixed end to wobble. This wobble not only seriously affects machining accuracy, leading to problems such as turning dimensional deviations and substandard grinding surface roughness, thus reducing product quality, but also increases safety risks during the machining process. The wobble actuator may collide with the machining equipment, damaging components such as cutting tools and grinding rollers, and even causing personal injury to operators, resulting in many adverse effects on production. Therefore, the present invention solves the above problems by setting the above structure. When the electric valve actuator is positioned and clamped, the electric valve actuator is placed in the middle of the platform 1 and each positioning guide rail 21 is activated. The clamping block 2 in the positioning guide rail 21 will slide along the positioning guide rail 21. The clamping blocks 2 approach each other to clamp and fix the electric valve actuator. During the sliding of the clamping block 2, the fixing block 31 will slide. The sliding of the fixing block 31 drives the rack plate 33 to slide. The sliding of the rack plate 33 drives the cam 36 to rotate. The rotation of the cam 36 drives the rotating rod 37 to rotate, so that the connecting plate 39 at the top of the rotating rod 37 will lock the top of the electric valve actuator, thereby performing secondary limiting and fixing. During the process of the connecting plate 39 rotating and engaging with the top of the electric valve actuator, the third cone block 318 on one side of the connecting plate 39 contacts the outer wall of the electric valve actuator. The third cone block 318 is squeezed and compressed into the connecting groove 310. During the process of retracting into the connecting groove 310, it squeezes the second cone block 316, causing the second cone block 316 to slide within the connecting groove 310. Then, the second cone block 316 squeezes the first cone block 315. After being squeezed, the first cone block 315 slides, thereby squeezing one end of the limiting block 312, thus limiting... The positioning block 312 protrudes from the connecting groove 310. After the limiting block 312 protrudes from the connecting groove 310, it forms a concave end with the connecting plate 39, which engages with the top of the electric valve actuator, so that the turning tool can turn the pipe wall of the electric valve actuator. After the turning work is completed, during the retraction of the connecting plate 39, the compression springs 314 on both sides of the limiting block 312 rebound, driving the sliding block 313 to reset along the sliding groove 311, thereby indirectly driving the third cone block 318 to protrude again and complete the positioning work. The electric valve actuator is initially clamped and fixed by the clamping blocks 2 approaching each other. Then, through a series of linkages, the connecting plate 39 at the top of the rotating rod 37 latches onto the top of the electric valve actuator for secondary positioning, which greatly improves the stability of positioning, effectively prevents the actuator from shaking during processing, and ensures turning accuracy. During the clamping process of the connecting plate 39, the linkage design of the cone block and the limiting block 312 can more stably clamp and fix the electric valve actuator. After turning is completed, the compression spring 314 helps the components to reset, so that the third cone block 318 protrudes again, which is convenient for the next positioning. The overall structure is ingenious, which improves processing efficiency and quality, and reduces operation difficulty and cost.

[0024] Example 2: Figures 1 to 6 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a connecting shaft 38 is rotatably connected to the top end of the rotating rod 37; a connecting plate 39 is fixedly connected to one end of the connecting shaft 38; an auxiliary plate 4 is fixedly connected to the other end of the connecting shaft 38; an auxiliary ring 41 is fixedly connected to the top end of the auxiliary plate 4; the connecting plate 39 and the auxiliary plate 4 are switched by a switching device provided on one side of the fixed plate 3; the switching device includes a fixed motor 44 fixedly connected to the fixed side; a rotating disk 45 is fixedly connected to the output end of the fixed motor 44; an auxiliary rod 46 is fixedly connected to one side of the rotating disk 45; the auxiliary rod... 46 is used to push the connecting plate 39 and the auxiliary plate 4 to switch. The top of the fixed plate 3 is provided with a cleaning component, which is used to clean the auxiliary ring 41 and remove metal debris from the surface of the auxiliary ring 41. The cleaning component includes a hydraulic cylinder 42 fixed to the top of the fixed plate 3. The output end of the hydraulic cylinder 42 is fixed with a rotating roller 43. Several brushes are provided on the circumferential surface of the rotating roller 43. When cleaning the auxiliary ring 41, the hydraulic cylinder 42 is activated to make the rotating roller 43 approach the inner wall of the auxiliary ring 41, thereby cleaning the inner wall of the auxiliary ring 41.

[0025] Specifically, when the end of the electric valve actuator is being machined, the fixed motor 44 of the switching component is started. The start of the fixed motor 44 drives the rotating disk 45 to rotate. The rotation of the rotating disk 45 drives the auxiliary rod 46 to rotate. The rotation of the auxiliary rod 46 drives the auxiliary plate 4 to rotate upward. The rotation of the auxiliary plate 4 drives the connecting shaft 38 to rotate. The rotation of the connecting shaft 38 drives the connecting plate 39 to rotate downward, thereby completing the switching operation. Then, during the sliding process of the clamping block 2, the rotating rod 37 is driven to rotate, so that the auxiliary plate 4 can perform arc-shaped limiting work on the outer wall of the electric valve actuator, exposing the end of the electric valve actuator. The auxiliary cutting tool performs turning and grinding work on the end of the electric valve actuator. In addition, after the auxiliary ring 41 completes the limiting work and resets, the hydraulic cylinder 42 is started to drive the rotating roller 43 to move downward, cleaning the steel chips adhering to the inner wall of the auxiliary ring 41. By starting the fixed motor 44 and achieving a series of linkages, the switching is realized, allowing the clamping block 2 to slide and drive the rotating rod 37 to rotate. This causes the auxiliary plate 4 to be arc-shapedly limited on the outer wall of the electric valve actuator, exposing the end. This creates conditions for the turning and grinding work of the cutting tool, greatly improving the accuracy and convenience of the machining. Moreover, after the auxiliary ring 41 completes the limiting and reset, the hydraulic cylinder 42 drives the rotating roller 43 to move down to clean the steel chips on its inner wall. This effectively avoids the steel chip residue affecting the wear of the outer wall of the electric valve actuator during the subsequent positioning process, ensuring the cleanliness of the machining environment and the normal operation of the equipment. This improves the quality and efficiency of the machining of the end of the electric valve actuator, and enables the switching of positioning and clamping between two different working conditions when the electric valve actuator is being machined at the end and on the outer wall.

[0026] Working principle: When the electric valve actuator is positioned and clamped, the electric valve actuator is placed in the middle of the platform 1. Each positioning guide rail 21 is activated, and the clamping blocks 2 inside the positioning guide rail 21 slide along the positioning guide rail 21. The clamping blocks 2 move closer to each other to clamp and fix the electric valve actuator. During the sliding of the clamping blocks 2, the fixing block 31 will slide. The sliding of the fixing block 31 drives the rack plate 33 to slide. The sliding of the rack plate 33 drives the cam 36 to rotate. The rotation of the cam 36 drives the rotating rod 37 to rotate, so that the connecting plate 39 at the top of the rotating rod 37 will lock onto the top of the electric valve actuator, thereby performing secondary limiting and fixing. During the process of the connecting plate 39 rotating and engaging with the top of the electric valve actuator, the third cone block 318 on one side of the connecting plate 39 contacts the outer wall of the electric valve actuator. The third cone block 318 is squeezed and compressed into the connecting groove 310. During the process of retracting into the connecting groove 310, it squeezes the second cone block 316, causing the second cone block 316 to slide within the connecting groove 310. Then, the second cone block 316 squeezes the first cone block 315. After being squeezed, the first cone block 315 slides, thereby squeezing one end of the limiting block 312, thus limiting... The positioning block 312 protrudes from the connecting groove 310. After the limiting block 312 protrudes from the connecting groove 310, it forms a concave end with the connecting plate 39, which engages with the top of the electric valve actuator, so that the turning tool can turn the pipe wall of the electric valve actuator. After the turning work is completed, during the retraction of the connecting plate 39, the compression springs 314 on both sides of the limiting block 312 rebound, driving the sliding block 313 to reset along the sliding groove 311, thereby indirectly driving the third cone block 318 to protrude again and complete the positioning work. The electric valve actuator is initially clamped and fixed by the clamping blocks 2 approaching each other. Then, through a series of linkages, the connecting plate 39 at the top of the rotating rod 37 latches onto the top of the electric valve actuator for secondary positioning, which greatly improves the stability of positioning, effectively prevents the actuator from shaking during processing, and ensures turning accuracy. During the clamping process of the connecting plate 39, the linkage design of the cone block and the limiting block 312 can clamp and fix the electric valve actuator more stably. After turning is completed, the compression spring 314 helps the components to reset, so that the third cone block 318 protrudes again, which is convenient for the next positioning. The overall structure is ingenious, which improves processing efficiency and quality, and reduces operation difficulty and cost. Then, when the end of the electric valve actuator is machined, the fixed motor 44 of the switching component is started. The start of the fixed motor 44 drives the rotating disk 45 to rotate. The rotation of the rotating disk 45 drives the auxiliary rod 46 to rotate. The rotation of the auxiliary rod 46 drives the auxiliary plate 4 to rotate upward. The rotation of the auxiliary plate 4 drives the connecting shaft 38 to rotate. The rotation of the connecting shaft 38 drives the connecting plate 39 to rotate downward, thereby completing the switching operation. Then, during the sliding process of the clamping block 2, the rotating rod 37 is driven to rotate, so that the auxiliary plate 4 can perform arc-shaped limiting work on the outer wall of the electric valve actuator, exposing the end of the electric valve actuator. The auxiliary cutting tool performs turning and grinding work on the end of the electric valve actuator. In addition, after the auxiliary ring 41 completes the limiting work and resets, the hydraulic cylinder 42 is started to drive the rotating roller 43 to move downward, cleaning the steel chips adhering to the inner wall of the auxiliary ring 41. By starting the fixed motor 44 and achieving a series of linkages, the switching is realized, allowing the clamping block 2 to slide and drive the rotating rod 37 to rotate. This causes the auxiliary plate 4 to be arc-shapedly limited on the outer wall of the electric valve actuator, exposing the end. This creates conditions for the turning and grinding work of the cutting tool, greatly improving the accuracy and convenience of the machining. Moreover, after the auxiliary ring 41 completes the limiting and reset, the hydraulic cylinder 42 drives the rotating roller 43 to move down to clean the steel chips on its inner wall. This effectively avoids the steel chip residue affecting the wear of the outer wall of the electric valve actuator during the subsequent positioning process, ensuring the cleanliness of the machining environment and the normal operation of the equipment. This improves the quality and efficiency of the machining of the end of the electric valve actuator, and enables the switching of positioning and clamping between two different working conditions when the electric valve actuator is being machined at the end and on the outer wall.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite machining positioning table for a self-centering electric valve actuator, comprising a table body (1), wherein a plurality of positioning guide rails (21) are provided on the upper surface of the table body (1), and a clamping block (2) is slidably connected in each of the positioning guide rails (21), and the plurality of clamping blocks (2) are arranged in a circumferential array, characterized in that: The upper surface of the platform (1) is also provided with several sets of limiting components. Each set of limiting components includes a fixing groove (32) opened on the upper surface of the platform (1). A fixing block (31) is slidably connected in the fixing groove (32). The fixing block (31) is fixedly connected to the clamping block (2). A rack plate (33) is fixedly connected to one side of the fixing block (31). The rack plate (33) drives a driving member. The driving member drives a rotating rod (37) set on the upper surface of the platform (1) to rotate. A connecting plate (39) is rotatably connected to the top of the rotating rod (37). The cross section of the connecting plate (39) is "L" shaped. The connecting plate (39) is used to perform secondary limiting on the electric valve actuator. An auxiliary plate (4) is provided on the side of the rotating rod (37) away from the connecting plate (39), and the auxiliary plate (4) is used to limit the arc surface of the electric valve actuator.

2. The composite machining positioning table for a self-centering electric valve actuator according to claim 1, characterized in that: The driving component includes a positioning block (34) fixed to the upper surface of the platform (1), a rotating shaft (35) is rotatably connected to the middle of the positioning block (34), a cam (36) is fixed to one end of the rotating shaft (35), the cam (36) meshes with the rack plate (33), and a rotating rod (37) is fixed to the other end of the rotating shaft (35).

3. The composite machining positioning table for a self-centering electric valve actuator according to claim 2, characterized in that: The top end of the rotating rod (37) is rotatably connected to a connecting shaft (38). One end of the connecting shaft (38) is fixedly connected to a connecting plate (39), and the other end of the connecting shaft (38) is fixedly connected to an auxiliary plate (4). The top end of the auxiliary plate (4) is fixedly connected to an auxiliary ring (41). The connecting plate (39) and the auxiliary plate (4) are switched by a switching component provided on one side of the fixed plate (3).

4. The composite machining positioning table for a self-centering electric valve actuator according to claim 3, characterized in that: The switching component includes a fixed motor (44) fixed to a fixed side, a rotating disk (45) fixed to the output end of the fixed motor (44), and an auxiliary rod (46) fixed to one side of the rotating disk (45). The auxiliary rod (46) is used to push the connecting plate (39) and the auxiliary plate (4) to switch.

5. A composite machining positioning table for a self-centering electric valve actuator according to claim 3, characterized in that: The top of the fixing plate (3) is provided with a cleaning component, which is used to clean the auxiliary ring (41) and remove metal debris from the surface of the auxiliary ring (41).

6. The composite machining positioning table for a self-centering electric valve actuator according to claim 5, characterized in that: The cleaning component includes a hydraulic cylinder (42) fixed to the top of the fixed plate (3). A rotating roller (43) is fixed to the output end of the hydraulic cylinder (42). Several brushes are provided on the circumferential surface of the rotating roller (43). When cleaning the auxiliary ring (41), the hydraulic cylinder (42) is activated to make the rotating roller (43) approach the inner wall of the auxiliary ring (41) and then clean the inner wall of the auxiliary ring (41).

7. The composite machining positioning table for a self-centering electric valve actuator according to claim 1, characterized in that: The connecting plate (39) is provided with a locking device inside. The locking device includes a connecting groove (310) opened inside the connecting plate (39). A sliding groove (311) is opened in the connecting groove (310). A sliding block (313) is slidably connected in the sliding groove (311). A compression spring (314) is fixed between the sliding block (313) and the sliding groove (311). A limit block (312) is fixed between the two sliding blocks (313). A first cone block (315) and a second cone block (316) are also slidably connected in the connecting groove (310). An auxiliary groove (317) is also opened in the inner wall of the connecting groove (310). A third cone block (318) is slidably connected in the auxiliary groove (317).

8. A composite machining positioning table for a self-centering electric valve actuator according to claim 2, characterized in that: When the electric valve actuator is positioned and clamped, the electric valve actuator is placed in the middle of the platform (1), and each positioning guide rail (21) is activated. The clamping block (2) in the positioning guide rail (21) will slide along the positioning guide rail (21). The clamping blocks (2) approach each other to clamp and fix the electric valve actuator. During the sliding process of the clamping block (2), the fixing block (31) will slide. The sliding of the fixing block (31) drives the rack plate (33) to slide. The sliding of the rack plate (33) drives the cam (36) to rotate. The rotation of the cam (36) drives the rotating rod (37) to rotate, so that the connecting plate (39) at the top of the rotating rod (37) will lock the top of the electric valve actuator, thereby performing secondary limiting and fixing.

9. A composite machining positioning table for a self-centering electric valve actuator according to claim 7, characterized in that: During the process of the connecting plate (39) rotating and engaging with the top of the electric valve actuator, the third cone (318) on one side of the connecting plate (39) contacts the outer wall of the electric valve actuator. The third cone (318) is squeezed into the connecting groove (310). During the process of retracting into the connecting groove (310), the second cone (316) is squeezed, causing the second cone (316) to slide in the connecting groove (310). Then the second cone (316) squeezes the first cone (315). The first cone (315) slides after being squeezed, thereby squeezing one end of the limiting block (312) so that... The limiting block (312) protrudes from the connecting groove (310). After the limiting block (312) protrudes from the connecting groove (310), it forms a concave end with the connecting plate (39) to engage the top of the electric valve actuator, so that the turning tool can turn the pipe wall of the electric valve actuator. After the turning work is completed, during the retraction of the connecting plate (39), the compression springs (314) on both sides of the limiting block (312) rebound, driving the sliding block (313) to reset along the sliding groove (311), thereby indirectly driving the third cone block (318) to protrude again and complete the positioning work.

10. A composite machining positioning table for a self-centering electric valve actuator according to claim 9, characterized in that: When the end of the electric valve actuator is machined, the fixed motor (44) of the switching component is started. The start of the fixed motor (44) drives the rotating disk (45) to rotate. The rotation of the rotating disk (45) drives the auxiliary rod (46) to rotate. The rotation of the auxiliary rod (46) drives the auxiliary plate (4) to rotate upward. The rotation of the auxiliary plate (4) drives the connecting shaft (38) to rotate. The rotation of the connecting shaft (38) drives the connecting plate (39) to rotate downward, thereby completing the switching operation. Then, during the sliding process of the clamping block (2), the rotating rod (37) is driven to rotate, so that the auxiliary plate (4) can perform arc-shaped limiting work on the outer wall of the electric valve actuator, exposing the end of the electric valve actuator. The auxiliary cutting tool performs turning and grinding work on the end of the electric valve actuator. In addition, after the auxiliary ring (41) completes the limiting work and resets, the hydraulic cylinder (42) is started to drive the rotating roller (43) to move downward, and the steel chips adhering to the inner wall of the auxiliary ring (41) are cleaned.

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