A valve inner valve seat processing device

Abstract

The application belongs to the technical field of valve seat milling, in particular to a valve inner valve seat processing device, which comprises a rack, one end of the rack is provided with a mechanical arm, a milling cutter is arranged on the mechanical arm, a fixed plate is fixedly connected to the surface of the rack, a rotating disc is rotatably connected to the upper surface of the fixed plate, a plurality of first sliding grooves are arranged on the upper surface of the rotating disc in an array, an upper sliding block is slidably connected to the inside of each first sliding groove, a moving block is slidably connected to the upper surface of each upper sliding block, a fixed block is fixedly connected to one end of the moving block, and an antiskid pad is slidably connected to the side surface of the fixed block. By arranging the antiskid pad, the antiskid pad always rigidly holds the outer wall of the inner valve seat, and the valve seat is driven to rotate synchronously by the rigid clamping friction force, thereby avoiding the slipping phenomenon of the roller and the valve seat in the rotating process due to the cutting chips and oil stains when the roller is used to drive the valve seat to rotate.

Description

Technical Field

[0001] This invention belongs to the field of valve seat milling technology, specifically a valve seat machining device. Background Technology

[0002] The inner valve seat is the core sealing component of the ventilation valve. It needs to fit closely with the valve core and rely on the mating surface to achieve a seal and prevent media leakage. The cast or forged blank has a rough surface. By milling the sealing end face and outer sealing surface of the inner valve seat, a smooth and high-precision sealing mating surface can be obtained, which can ensure the sealing performance of the valve.

[0003] A patent with publication number CN122142390B discloses a ventilation valve seat milling device, including a milling machine body, a multi-axis robotic arm mounted on the milling machine body, a milling cutter mounted on the multi-axis robotic arm, a valve seat workpiece disposed on the milling machine body, and a milling assembly disposed on the milling machine body. The milling assembly includes a base, which is fixedly connected to the milling machine body. An inner cavity is opened in the base, and four guide grooves are opened in a circular array on the top of the base.

[0004] When the valve seat milling device is used to process the area of ​​the valve seat workpiece that is blocked by the clamping plate and pressure plate, it releases the rubber pad and pressure plate to rigidly lock the valve seat workpiece, and uses the tension spring to keep the roller in contact with the outer wall of the valve seat workpiece. Then, it drives the roller to rotate, and the roller drives the valve seat to rotate through friction, so that the area that was originally clamped and blocked is rotated to the milling position. After re-locking, the valve seat workpiece can be milled.

[0005] The aforementioned valve seat milling device uses roller friction drive to achieve in-situ rotation of the valve seat workpiece. It relies on the friction between the roller and the outer wall of the workpiece to transmit rotational torque. However, it has the following technical problems: When the metal chips and oil generated during milling adhere to the roller or the outer wall of the valve seat workpiece, the friction coefficient will be reduced, and slippage between the roller and the valve seat workpiece is likely to occur. This results in inconsistent actual rotation angles of the valve seat and poor rotation indexing and positioning accuracy. Consequently, the machining blind area originally covered by the fixture cannot be accurately rotated to the milling cutter machining station, and the clamping area and the area to be machined are misaligned. This leads to the problem that the original clamping and obscured parts cannot be milled properly, and some areas still have residual machining blind areas.

[0006] Therefore, the present invention provides a valve seat machining device. Summary of the Invention

[0007] In order to overcome the shortcomings of the existing technology and solve the problem of slippage between the roller and the valve seat workpiece mentioned in the background technology, which causes the original clamping and obstruction parts to be unable to be milled properly and some areas still have machining blind spots.

[0008] The technical solution adopted by the present invention to solve its technical problem is as follows: A valve seat processing device of the present invention includes a frame, a mechanical arm is provided at one end of the frame, a milling cutter is provided on the mechanical arm, a fixed plate is fixedly connected to the surface of the frame, a turntable is rotatably connected to the upper surface of the fixed plate, a plurality of first sliding grooves are arranged in an array on the upper surface of the turntable, an upper slide block is slidably connected inside each first sliding groove, a moving block is slidably connected to the upper surface of each upper slide block, a fixed block is fixedly connected to one end of the moving block, an anti-slip pad is slidably connected to the side of the fixed block, an insert rod is slidably connected inside each upper slide block, a pressure plate is slidably connected to the surface of the insert rod, a fixed frame is fixedly connected to the bottom of the inner cavity of the fixed plate and located inside the turntable, a plurality of second sliding grooves are arranged in a circumferential array on the upper surface of the fixed frame, and a clamping plate is slidably connected inside the second sliding groove.

[0009] Preferably, a drive motor is fixedly connected to the lower surface of the fixed plate, a drive gear is fixedly connected to the output end of the drive motor, a drive gear ring is fixedly connected to the outer wall of the turntable, the surfaces of the drive gear ring and the drive gear mesh with each other, a fixed cover is fixedly connected to the upper surface of the fixed plate, and the drive gear ring and the drive gear are both located inside the fixed cover.

[0010] Preferably, a rotating gear ring is rotatably connected to the inner sidewall of the turntable, a rotating gear is rotatably connected to the inner bottom of the turntable, a rack is slidably connected to the inner bottom of the turntable, the rack and the rotating gear ring mesh with the rotating gear respectively, a rotating motor is fixedly connected to the inner wall of the turntable, the output end of the rotating motor is fixedly connected to the rotating end of one of the rotating gears, a lower slider is fixedly connected to one end of the rack, and the insert rod is located inside the upper slider and the lower slider.

[0011] Preferably, a plurality of support plates are fixedly connected to the inner bottom of the fixed plate and to the inner side of the fixed frame. Each support plate has an elastic telescopic rod fixedly connected to one side and the interior of the second slide groove. The telescopic end of the elastic telescopic rod is fixedly connected to the interior of the clamping plate.

[0012] Preferably, the bottom inner side of the fixing plate is fixedly connected with a plurality of top blocks in a circular array, the upper surface of the top blocks is provided with an inclined surface, the outside of the insertion rod is fitted with a tension spring, the lower end of the tension spring is fixedly connected to the upper surface of the lower slider, and a sealing strip is installed inside each of the first and second slide grooves, the sealing strip being a wavy folded plate.

[0013] Preferably, the insertion rod is externally fixedly connected to a connecting frame, the upper end of the tension spring is fixedly connected to the lower part of the connecting frame, a limiting plate is symmetrically fixedly connected to the surface of the connecting frame, a moving groove is provided inside the limiting plate, a push rod is slidably connected inside the moving groove, a collar is fixedly connected to the surface of the push rod, a connecting rod is slidably connected inside the collar, a groove is provided inside the connecting rod, a connecting spring is fixedly connected between the inner wall of the groove and one side of the collar, one end of the connecting rod is slidably connected to the inner wall of the clamping plate, both sides of the moving groove are set as slopes, a notch is provided inside the moving groove, a retaining ring is fixedly connected to the surface of the connecting rod, a protrusion is slidably connected inside the connecting rod through a spring, and the lower surface of the protrusion is set as a slope.

[0014] Preferably, the connecting frame is provided with a limiting groove on the side near the fixed frame. The limiting groove is slidably connected to one end of the connecting rod. The limiting groove includes a forward section, a clamping section is provided on one side of the forward section, a backward section is provided on the lower side of the clamping section, and a reset section is provided on the upper side of the backward section. The groove depth of the reset section is shallower than the groove depth of the forward section, and the interior of the backward section is provided with a slope.

[0015] Preferably, the surface of the insertion rod is provided with a pressing groove, a limiting rod is slidably connected inside the pressing groove, the limiting rod is fixedly connected to the inner wall of the moving block, the pressing groove includes a rising section, and a pressing section is provided on the lower side of the rising section.

[0016] Preferably, a sealing cover is fixedly connected to the surface of the insertion rod, the sealing cover is sleeved on the outer wall of the movable block, a positioning rod is fixedly connected to one side of the sealing cover, and a positioning groove is provided on the upper surface of the anti-slip pad, the positioning groove and the positioning rod are matched in size.

[0017] Preferably, an arc-shaped plate is fixedly connected inside the fixing block, the back side of the anti-slip pad is slidably connected to the surface of the arc-shaped plate, and a first spring is fixedly connected between the back side of the anti-slip pad and the inner wall of the fixing plate.

[0018] The beneficial effects of this invention are as follows: 1. The valve seat machining device of the present invention, by providing an anti-slip pad, the anti-slip pad always rigidly hugs the outer wall of the inner valve seat, and the valve seat is driven to rotate synchronously by the rigid clamping friction. This avoids the slippage phenomenon that occurs when the valve seat is driven by a roller due to chips and oil stains during the rotation of the roller and the valve seat. As a result, the machining blind area originally covered by the fixture cannot be accurately rotated to the milling cutter machining station, and the milling operation needs to be repeated many times to complete the milling operation, thereby reducing the milling efficiency.

[0019] 2. The valve seat machining device of the present invention includes a clamping plate. After the valve seat is rotated into position, the clamping plate clamps and fixes the inner valve seat. During the entire process of the turntable driving the anti-slip pad assembly to retract and reset, the inner valve seat is always constrained and positioned by the clamping plate. There is no need to remove the inner valve seat from the fixture, saving workpiece disassembly. At the same time, it avoids the inner valve seat from shaking or shifting position during the anti-slip pad reset process, which would prevent the machining blind area covered by the fixture from being accurately rotated to the milling cutter machining station, thus causing inconsistent milling of the valve seat surface.

[0020] 3. The valve seat processing device of the present invention can automatically complete the engagement and disengagement of the positioning rod and the positioning groove following the lifting and lowering action of the insertion rod. After the clamping plate locks the workpiece, the clamping of the anti-slip pad on the inner valve seat can be released simultaneously, completely eliminating the interference of the clamping plate and the anti-slip pad in bidirectional superimposed clamping, avoiding the anti-slip pad from rubbing against the outer wall of the valve seat when the turntable continues to rotate, and preventing scratches on the surface of the processed workpiece.

[0021] 4. The valve seat processing device of the present invention, by setting up a plug rod, can realize automatic switching of clamping state by rotating the turntable and driving the plug rod to rotate and move upward, avoiding the problems of workpiece shaking, positioning offset, and clamping failure caused by the asynchronous movement of the clamping plate and anti-slip pad due to the disorder of the electrical control timing. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural schematic diagram of the fixing plate, turntable, insertion rod, and fixing frame of the present invention; Figure 3 This is a partial structural cross-sectional view of the fixing plate and fixing cover of the present invention; Figure 4 This is a partial structural cross-sectional view of the fixing plate and turntable of the present invention; Figure 5 This is a schematic diagram of the mating structure of the rotating gear ring and the rotating gear ring of the present invention; Figure 6 This is a schematic diagram of the structure of the insertion rod, the moving block, and the insertion rod of the present invention; Figure 7 This is a schematic diagram of the connecting rod of the present invention; Figure 8 This is a schematic diagram of the structure of the insertion rod and the moving block of the present invention; Figure 9 This is a cross-sectional view of the structure of the insertion rod and the moving block of the present invention; Figure 10 This is a schematic diagram of the structure of the insertion rod of the present invention; Figure 11This is a schematic diagram of the structure of the insertion rod and connecting frame of the present invention; Figure 12 This is a schematic diagram of the connecting frame of the present invention; Figure 13 This is a schematic diagram of the structure of the fixing block and anti-slip pad of the present invention; Figure 14 A partial structural cross-sectional view of the fixing block and anti-slip pad of the present invention; In the diagram: 1. Frame; 11. Robotic arm; 12. Milling cutter; 2. Fixing plate; 21. Fixing cover; 22. Drive motor; 221. Drive gear; 23. Top block; 3. Turntable; 31. Drive gear ring; 32. First slide groove; 321. Sealing strip; 33. Upper slide block; 34. Moving block; 341. Limiting rod; 342. Fixing block; 343. Arc plate; 344. First spring; 35. Rotating gear ring; 36. Rotating gear; 361. Rotating motor; 37. Rack; 371. Lower slide block; 38. Anti-slip pad; 381. Positioning groove; 4. Insert rod; 41. Connecting frame ; 42. Limiting groove; 421. Forward section; 422. Clamping section; 423. Reverse section; 424. Reset section; 43. Limiting plate; 431. Moving groove; 432. Notch; 44. Connecting rod; 441. Retaining ring; 442. Push rod; 443. Protrusion; 444. Collar; 445. Connecting spring; 45. Extrusion groove; 451. Rising section; 452. Extrusion section; 46. Tension spring; 47. Pressure plate; 48. Sealing cover; 481. Positioning rod; 5. Fixing frame; 51. Second slide groove; 52. Support plate; 53. Elastic telescopic rod; 531. Clamping plate; 6. Inner valve seat. Detailed Implementation

[0024] 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.

[0025] Example 1, as Figures 1 to 14As shown in the embodiment of the present invention, a valve seat processing device includes a frame 1. A robotic arm 11 is provided at one end of the frame 1, and a milling cutter 12 is provided on the robotic arm 11. A fixing plate 2 is fixedly connected to the surface of the frame 1. A turntable 3 is rotatably connected to the upper surface of the fixing plate 2. A plurality of first sliding grooves 32 are arranged in a circular array on the upper surface of the turntable 3. An upper sliding block 33 is slidably connected inside each first sliding groove 32. A moving block 34 is slidably connected to the upper surface of each upper sliding block 33. A T-shaped block is provided on the lower surface of the moving block 34. A T-shaped groove matching the T-shaped block is provided inside the upper sliding block 33. The moving block 34 slides within the upper sliding block 33 by the cooperation of the T-shaped block and the T-shaped groove. A fixing block 342 is fixedly connected to one end, and an anti-slip pad 38 is slidably connected to the side of the fixing block 342. An insert rod 4 is slidably connected inside each of the upper sliders 33. The insert rod 4 passes through the upper slider 33 from top to bottom. A pressure plate 47 is slidably connected to the surface of the insert rod 4. A bolt is threaded inside the pressure plate 47. An insertion hole is provided on the surface of the insert rod 4. When the pressure plate 47 slides to a suitable height on the surface of the insert rod 4, the bolt is twisted so that the bolt enters the insertion hole on the surface of the insert rod 4, thereby fixing the pressure plate 47. A fixing frame 5 is fixedly connected to the bottom of the inner cavity of the fixing plate 2 and located inside the turntable 3. Several second sliding grooves 51 are arranged in a circumferential array on the upper surface of the fixing frame 5. A clamping plate 531 is slidably connected inside the second sliding grooves 51.

[0026] In this device, the upper end of the fixing plate 2 is provided with a circular recessed groove, the inside of the turntable 3 is provided with a hollow cavity, the fixing frame 5 is composed of a cylinder and a circular plate, the upper end of the cylinder is fixedly connected to the circular plate, and the cylinder and the circular plate are coaxial. The upper and lower sides of the turntable 3 are provided with circular through holes that are compatible with the fixing frame 5, and the turntable 3 is rotatably installed on the outside of the fixing frame 5 through the circular through holes.

[0027] The robotic arm 11 in this device adopts the multi-axis robotic arm 11 in the prior art, and one side of the anti-slip pad 38 of this device is set to be an arc shape that matches the outer wall of the inner valve seat 6.

[0028] Specifically, when the existing internal valve seat 6 is milled, the valve seat is generally placed on the milling machine table, and the valve seat is fixed by the clamping mechanism to complete the workpiece positioning and clamping. Then, the multi-axis robotic arm 11 is controlled to drive the milling machine cutter to mill the valve seat and process features such as the sealing surface and end face. In the existing milling device, during the milling process of the inner valve seat 6, the area where the workpiece is held by the gripper will cover part of the valve seat surface to be machined. The area blocked by the gripper cannot be cut by the tool, forming a machining blind zone. To avoid this problem, the existing milling device improves the clamping mechanism. When the milling needs to process the area of ​​the valve seat workpiece that is blocked by the clamping plate 531 and the pressure plate 47, the rigid locking of the rubber pad and the pressure plate 47 on the valve seat workpiece is loosened. With the help of the tension spring 46, the roller is kept in contact with the outer wall of the valve seat workpiece. Then the roller is driven to rotate. The roller drives the valve seat to rotate through the friction force, so that the area that was originally clamped and blocked is rotated to the milling position. After re-locking, the valve seat workpiece can be milled. The above-mentioned clamping mechanism uses roller friction drive to achieve in-situ rotation of the valve seat workpiece. It relies on the friction between the roller and the outer wall of the workpiece to transmit rotational torque. However, it has the following technical problems: When metal chips and oil stains generated during milling adhere to the roller or the outer wall of the valve seat workpiece, the friction coefficient will be reduced, and slippage between the roller and the valve seat workpiece is likely to occur. This will cause the actual rotation angle of the valve seat to be inconsistent, and the rotation indexing positioning accuracy will be poor. As a result, the machining blind area that was originally covered by the fixture cannot be accurately rotated to the milling cutter machining station. The clamping area and the area to be machined will be misaligned, resulting in the problem that the original clamping and covering parts cannot be milled properly and some areas still have machining blind areas. To avoid the aforementioned technical problems, the device is used as follows: First, the inner valve seat 6 is placed on the fixed frame 5. Then, multiple upper sliders 33 and insert rods 4 are driven to slide in the first slide groove 32, so that the multiple upper sliders 33 gradually move closer to the central axis of the fixed frame 5. The upper sliders 33 drive the moving block 34, the fixed block 342 and the anti-slip pad 38 to move closer to the outer wall of the inner valve seat 6, so that the anti-slip pad 38 contacts the outer wall of the inner valve seat 6. The multiple anti-slip pads 38 cooperate to perform clamping, positioning and fixing operations on the inner valve seat 6, so that the inner valve seat 6 is in the center position of the fixed frame 5 and the two are coaxial. The insert rod 4 drives the pressure plate 47 to fix the upper surface of the valve seat. After the inner valve seat 6 is fixed, the robotic arm 11 is controlled to drive the milling cutter 12 to perform milling operations on the surface of the inner valve seat 6. When the outer wall of the valve seat is milled and the clamping and blocking parts need to be milled, the control robot arm 11 is reset, and then the turntable 3 is driven to rotate. The turntable 3 drives the upper slider 33 inside the first sliding groove 32 on its surface to rotate synchronously. The upper slider 33 drives the moving block 34, the fixed block 342 and the anti-slip pad 38 to rotate synchronously. The anti-slip pad 38 clamps and fixes the surface of the inner valve seat 6. Therefore, the anti-slip pad 38 drives the inner valve seat 6 to rotate synchronously. When the anti-slip pad 38 rotates to a certain angle and is completely offset from its previous position, that is, when the anti-slip pad 38 is released... When the clamping of the inner valve seat 6 returns to its original position, the part of the inner valve seat 6 that was originally clamped and covered is completely offset from the anti-slip pad 38 that has returned to its original position, so that the blind area of ​​the inner valve seat 6 is completely exposed. At this time, the drive rod 4 slides upward, and the drive rod 4 drives the pressure plate 47 to move upward. The pressure plate 47 releases the downward clamping operation on the upper surface of the valve seat. Then the drive clamping plate 531 slides in the second slide groove 51, so that multiple drive clamping plates 531 move synchronously closer to the inner valve seat 6. The surface of the inner valve seat 6 after the rotation angle is clamped and fixed by the cooperation of multiple clamping plates 531. After the clamp 531 fixes the inner valve seat 6, the insert rod 4 continues to move upward. The insert rod 4 drives the moving block 34 to slide on the upper surface of the upper slider 33, so that the moving block 34 moves away from the inner valve seat 6, and the moving block 34 drives the fixed block 342 and the anti-slip pad 38 away from the surface of the inner valve seat 6. Then the drive turntable 3 is reset. At this time, the anti-slip pad 38 is away from the surface of the inner valve seat 6. Therefore, the inner valve seat 6 will not rotate and reset synchronously with the anti-slip pad 38. The inner valve seat 6 is clamped and fixed by the clamping plate 531. After the turntable 3 is reset to the initial position, the drive moving block 34 is reset and slid on the upper slider 33. This causes the moving block 34 to drive the fixed block 342 and the anti-slip pad 38 to clamp and fix the surface of the inner valve seat 6. After the multiple anti-slip pads 38 clamp and fix the inner valve seat 6 again, the drive clamping plate 531 is reset, which makes it convenient to drive the inner valve seat 6 to rotate again for adjustment.

[0029] This device is equipped with an anti-slip pad 38, which always rigidly grips the outer wall of the inner valve seat 6. The valve seat is rotated synchronously by relying on the rigid clamping friction. This avoids the slippage that occurs when the roller drives the valve seat to rotate due to chips and oil. This prevents the machining blind area that was originally covered by the fixture from being accurately rotated to the milling cutter machining station. It requires repeated rotation angles and milling operations to be completed, which reduces milling efficiency. This device is equipped with a clamping plate 531. After the valve seat is rotated into position, the clamping plate 531 takes over to clamp and fix the inner valve seat 6. Throughout the entire process of the turntable 3 driving the anti-slip pad 38 assembly to retract and reset, the inner valve seat 6 is always constrained and positioned by the clamping plate 531. There is no need to remove the inner valve seat 6 from the tooling, saving workpiece disassembly. At the same time, it avoids the inner valve seat 6 from shaking or shifting position during the reset process of the anti-slip pad 38, which would prevent the machining blind area covered by the fixture from being accurately rotated to the milling cutter machining station, thus causing inconsistent milling of the valve seat surface.

[0030] like Figure 3 As shown, a drive motor 22 is fixedly connected to the lower surface of the fixed plate 2, and a drive gear 221 is fixedly connected to the output end of the drive motor 22. A drive gear ring 31 is fixedly connected to the outer wall of the turntable 3. The teeth of the drive gear ring 31 and the drive gear 221 mesh with each other. A fixed cover 21 is fixedly connected to the upper surface of the fixed plate 2. The drive gear ring 31 and the drive gear 221 are both located inside the fixed cover 21. The fixed cover 21 can prevent external impurities from entering the meshing gap between the drive gear ring 31 and the drive gear 221.

[0031] In this device, a circular groove is provided through the upper surface of the fixed cover 21. The turntable 3 is rotatably installed in the circular groove. In order to ensure that the turntable 3 can be stably installed in the circular groove, an annular groove is provided on the side of the turntable 3. A sector block is slidably connected in the annular groove, and the sector block is fixedly connected to the inner wall of the circular groove. Specifically, when it is necessary to drive the turntable 3 to rotate, the drive motor 22 can be turned on. The drive motor 22 drives the drive gear 221 at its output end to rotate. The drive gear 221 meshes with the drive gear ring 31, causing the drive gear ring 31 to drive the turntable 3 to rotate. The annular groove on the side of the turntable 3 rotates along the sector block, thereby ensuring that the turntable 3 can rotate stably without jumping up and down.

[0032] like Figure 4 and Figure 5 As shown, a rotating gear ring 35 is rotatably connected to the inner sidewall of the turntable 3, a rotating gear 36 is rotatably connected to the inner bottom of the turntable 3, and a rack 37 is slidably connected to the inner bottom of the turntable 3. The rack 37 and the rotating gear ring 35 mesh with the rotating gear 36 respectively. A rotating motor 361 is fixedly connected to the inner wall of the turntable 3. The output end of the rotating motor 361 is fixedly connected to the rotating end of one of the rotating gears 36. A lower slider 371 is fixedly connected to one end of the rack 37. The insertion rod 4 is located inside the upper slider 33 and the lower slider 371, and the insertion rod 4 and the lower slider 371 are slidably connected vertically. A sleeve is inserted through and fixedly inserted into the outer wall of the turntable 3. The power cord of the rotating motor 361 can pass through the sleeve and be electrically connected to an external controller.

[0033] Among them, limit rings are symmetrically installed on the upper and lower sides of the rotating gear ring 35. The outer side wall of the limit ring is fixedly connected to the inner side wall of the turntable 3. The rotating gear ring 35 is rotatably connected to the limit ring. The two limit rings limit the rotation of the rotating gear ring 35 to ensure that the rotating gear ring 35 can rotate stably. One end of the rack 37 penetrates the side wall of the turntable 3, and the rack 37 is slidably connected to the turntable 3. The rack 37 is located below the limiting ring, and the staggered distribution between them will not affect each other's movement.

[0034] Specifically, when it is necessary to drive several upper sliders 33 to slide in the first slide groove 32, the rotary motor 361 can be turned on. The rotary motor 361 drives the rotary gear 36 on its output end to rotate. The rotary gear 36 meshes with the rotary gear ring 35. The rotary gear ring 35 rotates and drives the other rotary gears 36 to rotate synchronously, so that multiple rotary gears 36 rotate synchronously and mesh with the adjacent racks 37. This allows multiple racks 37 to slide synchronously in the inner lower surface of the turntable 3, and multiple racks 37 synchronously approach the central axis of the turntable 3. The rack 37 moves away from the central axis of the turntable 3, and the lower slider 371 slides inside the groove on the lower surface of the turntable 3. The lower slider 371 drives the upper slider 33 to slide synchronously through the insert rod 4. The upper slider 33 drives the fixed block 342 and the anti-slip pad 38 to move closer to or away from the inner valve seat 6 synchronously through the moving block 34. When multiple anti-slip pads 38 move closer to the inner valve seat 6 synchronously, the surface of the inner valve seat 6 is clamped and fixed by the multiple anti-slip pads 38. When multiple anti-slip pads 38 move away from the inner valve seat 6 synchronously, the clamping and fixing of the inner valve seat 6 is released.

[0035] like Figure 4 As shown, several support plates 52 are fixedly connected to the bottom inner side of the fixed plate 2 and inside the fixed frame 5. Each support plate 52 has an elastic telescopic rod 53 fixedly connected to one side and inside the second slide groove 51. The telescopic end of the elastic telescopic rod 53 is fixedly connected to the inside of the clamping plate 531.

[0036] The elastic telescopic rod 53 is a circular tube with an inner rod slidably installed inside. The end of the circular tube away from the inner rod is closed. A spring is installed between one end of the inner rod and the bottom of the inner cavity of the circular tube. The end of the inner rod away from the circular tube is the telescopic end, and the end of the circular tube away from the inner rod is the fixed end. Specifically, the elastic telescopic rod 53 is installed on the support plate 52, with its fixed end fixedly installed on the support plate 52 and its telescopic end fixedly connected to the clamping plate 531; the elastic telescopic rod 53 is installed in the second slide groove 51, with its fixed end fixedly connected to the inner wall of the second slide groove 51 and its telescopic end fixedly connected to the clamping plate 531.

[0037] like Figure 4As shown, a sealing strip 321 is installed inside each of the first slide groove 32 and the second slide groove 51. The sealing strip 321 is a wavy folded plate. The sealing strip 321 is used to seal the first slide groove 32 and the second slide groove 51 to prevent impurities generated during milling from entering the interior of the first slide groove 32 and the second slide groove 51, thereby affecting the normal movement of the clamping plate 531 and the upper slide block 33.

[0038] Specifically, the sealing strip 321 installed in the first slide groove 32 has its two ends fixedly connected to one end of the first slide groove 32 and the side of the upper slider 33, respectively, while the side of the sealing strip 321 slides in contact with the long side wall of the first slide groove 32; the sealing strip 321 installed in the second slide groove 51 has its two ends fixedly connected to one end of the second slide groove 51 and the side of the clamping plate 531, respectively, while the side of the sealing strip 321 slides in contact with the side wall of the second slide groove 51.

[0039] like Figures 6 to 9 As shown, the bottom inner side of the fixing plate 2 is fixedly connected with a number of top blocks 23 in a circular array. The upper surface of the top block 23 is provided with an inclined surface. The outside of the insertion rod 4 is fitted with a tension spring 46, and the lower end of the tension spring 46 is fixedly connected to the upper surface of the lower slider 371.

[0040] like Figures 8 to 10 As shown, a connecting frame 41 is fixedly connected to the outside of the insertion rod 4. The upper end of the tension spring 46 is fixedly connected to the lower part of the connecting frame 41. The tension spring 46 applies a downward pulling force to the connecting frame 41. Limiting plates 43 are symmetrically fixedly connected to the side of the connecting frame 41 near the fixing frame 5. An arc-shaped moving groove 431 is provided inside the limiting plate 43. The arc-shaped moving groove 431 is coaxial with the fixing frame 5. Push rods 442 are slidably connected inside the two symmetrical moving grooves 431. A collar 444 is fixedly connected to the surface of the push rod 442. A connecting rod 44 is slidably connected inside the collar 444. A groove is provided inside the connecting rod 44. The inner wall of the groove and A connecting spring 445 is fixedly connected to one side of the collar 444. A push rod 442 passes through the inside of the groove and is slidably connected to the groove. One end of the connecting rod 44 passes through the clamping plate 531 and is slidably connected to the fixing frame 5. The clamping plate 531 is slidably connected to the connecting rod 44. Both sides of the moving groove 431 are set as slopes. Notches 432 are symmetrically arranged at the end of the moving groove 431 near the insertion rod 4. A retaining ring 441 is fixedly connected to the surface of the connecting rod 44. The retaining ring 441 is located on the side of the clamping plate 531 facing outward. A protrusion 443 is slidably connected to the inside of the connecting rod 44 through a return spring. The lower surface of the protrusion 443 is set as a slope.

[0041] The connecting rod 44 has two sets of contraction grooves on its outside. Each set has two contraction grooves, and the two contraction grooves in each set are symmetrically distributed on the outside of the connecting rod 44. The protrusion 443 is slidably connected to the adjacent contraction groove. A return spring is fixedly connected between the protrusion 443 and the inner wall of the contraction groove. The return spring applies elastic force to the protrusion 443, so that the protrusion 443 can be moved out again after being squeezed and contracted into the contraction groove.

[0042] like Figure 11 As shown, the connecting frame 41 is provided with a limiting groove 42 on the side near the fixed frame 5. The limiting groove 42 is located between two limiting plates 43. The limiting groove 42 is slidably connected to one end of the connecting rod 44. The limiting groove 42 includes a forward section 421. One end of the forward section 421 is provided with an inclined clamping section 422. The lower end of the clamping section 422 is provided with a backward section 423. The end of the backward section 423 away from the clamping section 422 is provided with a reset section 424. The upper end of the reset section 424 is connected to the forward section 421. The groove depth of the backward section 423 is shallower than the groove depth of the forward section 421. The groove depths of the clamping section 422, the backward section 423, and the reset section 424 are the same. The inside of the clamping section 422 is provided with a slope.

[0043] like Figure 9 As shown, the surface of the insertion rod 4 is provided with a pressing groove 45, and a limiting rod 341 is slidably connected inside the pressing groove 45. The limiting rod 341 is fixedly connected to the inner wall of the moving block 34. The pressing groove 45 includes a rising section 451, and a pressing section 452 is provided at the lower end of the rising section 451. A stationary section is provided at the lower end of the pressing section 452. Both the rising section 451 and the stationary section are vertical grooves, and the pressing section 452 is an inclined groove.

[0044] The lower end of the insertion rod 4, the end of the connecting rod 44 near the connecting frame 41, the end of the limiting rod 341 inserted into the extrusion groove 45, and the upper surface of the protrusion 443 are all provided with ball bearings to reduce friction caused by movement.

[0045] Specifically, existing similar valve seat milling fixtures, in order to achieve the switching of the action of the anti-slip pad 38 rotating to drive the valve seat rotation and the clamping plate 531 taking over the clamping action, generally use multiple sets of independent servo motors to drive the clamping plate 531 and the anti-slip pad 38 assembly to work respectively. During the processing, the control system sends multiple electrical signals to control the clamping and loosening of the anti-slip pad 38, the feed clamping of the clamping plate 531, and the sequential action of each component. In actual production use, on the one hand, a large number of drive components are required, resulting in high hardware costs and complex control system program logic. On the other hand, it is difficult to debug the multi-motor coordination at the same time. When a single motor is damaged, the repair not only requires replacing the damaged parts, but also requires re-tuning the multi-motor coordination timing after the replacement, resulting in long downtime and thus a decrease in milling efficiency.

[0046] When it is necessary to automatically drive the clamping plate 531 to fix the inner valve seat 6 and the anti-slip pad 38 assembly to detach from the surface of the inner valve seat 6, the device operates as follows: In the initial state, the clamping plate 531 and the surface of the inner valve seat 6 are not in contact. Under the action of the connecting spring 445, one end of the connecting rod 44 abuts against the inner side wall of the limiting groove 42. When it is necessary to clamp the inner valve seat 6, the lower slider 371 drives the insert rod 4 and the upper slider 33 to slide closer to the surface of the inner valve seat 6. At the same time, the insert rod 4 drives the connecting frame 41 to move synchronously. The connecting frame 41 drives the limiting plate 43 and the limiting groove 42 to move synchronously. The push rod 442 on the surface of the connecting rod 44 is inside the moving groove 431. The limiting plate 43 pushes the push rod 442 to slide through the moving groove 431. The push rod 442 pushes the connecting rod 44 to move synchronously through the collar 444. The connecting rod 44 slides synchronously inside the clamping plate 531. At the same time, the connecting rod 44 drives the retaining ring 441 to slide synchronously. First, the connecting rod 44 drives the retaining ring 441 to move synchronously to one side of the clamping plate 531 and fit together. Then, the connecting rod 44 continues to slide and pushes the clamping plate 531 to squeeze the telescopic end of the elastic telescopic rod 53 through the retaining ring 441. At this time, the anti-slip pad 38 and the surface of the inner valve seat 6 are in contact, and one end of the connecting rod 44 is in the forward section 421 in the limiting groove 42 inside the connecting frame 41. When the turntable 3 rotates, the turntable 3 drives the insert rod 4 to rotate synchronously, the insert rod 4 drives the connecting frame 41 to rotate synchronously, the connecting frame 41 drives the limiting groove 42 and the moving groove 431 to slide synchronously, the inner wall of the moving groove 431 slides on the surface of the connecting rod 44, so that the advancing section 421 slides along the surface of the connecting rod 44, the inner wall of the moving groove 431 slides on the surface of the push rod 442, at this time the insert rod 4 drives the upper slider 33 to rotate synchronously, the upper slider 33 drives the moving block 34, the fixed block 342 and the anti-slip pad 38 to rotate, and the anti-slip pad 38 drives the inner valve seat 6 to rotate synchronously; When the insert rod 4 rotates to the slope of the top block 23, the insert rod 4 moves upward, stretching the tension spring 46. The insert rod 4 drives the connecting frame 41 and the limiting plate 43 to move upward synchronously. The limiting plate 43 drives the moving groove 431 to slide upward on the surface of the push rod 442. At the same time, the insert rod 4 drives the extrusion groove 45 to slide upward. At this time, the limiting rod 341 slides in the rising section 451 in the extrusion groove 45. When the limiting rod 341 is at the interface between the rising section 451 and the extrusion section 452, the advancing section 421 separates from the connecting rod 44, and the clamping section 422 contacts the connecting rod 44. The interior is provided with a slope. At this time, the ball of the connecting rod 44 slides in contact with the slope. At the same time, the slope presses the ball and the connecting rod 44. Since the push rod 442 is limited by the moving groove 431, the push rod 442 will not move synchronously with the connecting rod 44. Therefore, when the connecting rod 44 moves, it will press the connecting spring 445 and slide towards the inside of the clamping plate 531. The connecting rod 44 pushes the clamping plate 531 closer to the surface of the inner valve seat 6 through the retaining ring 441 and clamps it. The clamping plate 531 presses the elastic telescopic rod 53. At this time, the clamping plate 531 has clamped and fixed the surface of the inner valve seat 6. As the insertion rod 4 continues to slide on the slope of the top block 23, the insertion rod 4 continues to stretch the tension spring 46, causing the insertion rod 4 to continue to move upward. The insertion rod 4 drives the connecting frame 41 and the limiting plate 43 to slide upward synchronously. At this time, the clamping section 422 separates from the connecting rod 44, and the retracting section 423 contacts the connecting rod 44. The limiting plate 43 drives the moving groove 431 to move upward. The slopes on both sides of the moving groove 431 and the slopes of the protrusion 443 are in contact, so that the moving groove 431 can squeeze the protrusion 443 during the upward movement, causing the protrusion 443 to slide into the push rod 442 and pass through the inside of the moving groove 431. When the protrusion 443 passes through the moving groove 431, it can be reset by the reset spring. The upper surface of the protrusion 443 and the lower surface of the adjacent limiting plate 43 are in contact and in contact. At this time, the two protrusions 443 abut against the two sides of the moving groove 431, which can limit the limiting plate 43, so that the insertion rod 4 disengages from the top block 23 and then performs the reset movement, and will not slide downward. As the insertion rod 4 is pressed to its highest position by the slope of the top block 23, the limiting rod 341 slides through the pressing section 452. Through the pressing of the inner wall of the pressing section 452, the limiting rod 341 causes the moving block 34, the fixed block 342 and the anti-slip pad 38 to move away from the surface of the inner valve seat 6. During the process of resetting the insertion rod 4 to its initial position, the retracting section 423 slides along the connecting rod 44. When the interface between the retracting section 423 and the reset section 424 contacts the connecting rod 44, the notch 432 of the limiting plate 43 slides onto the protrusion 443. The insertion rod 4 is reset by the tension spring 46, which drives the insertion rod 4 to slide downward. The insertion rod 4 drives the connecting frame 41 to slide downward, causing the protrusion 443 to pass through the notch 432. The connecting frame 41 also causes the limiting groove 42 to descend, causing the reset section 424 to slide along the connecting rod 44 from bottom to top. During the process, the insertion rod 4 slides downward and drives the pressing section 452 to slide, so that the moving block 34 drives the fixing block 342 and the anti-slip pad 38 to fix the inner valve seat 6. After the fixing is completed, the reset section 424 separates from the connecting rod 44, the advancing section 421 contacts the connecting rod 44, and the elastic telescopic rod 53 pushes the clamping plate 531 and the retaining ring 441 to reset, so that the connecting rod 44 is released from the inner side of the advancing section 421 of the limiting groove 42. The connecting rod 44 releases the compression of the connecting spring 445 and drives the clamping plate 531 away from the surface of the inner valve seat 6, thus completing the replacement of the clamping surface of the inner valve seat 6.

[0047] This device automatically switches between clamping states by setting up a plug rod 4 and using the rotation of the turntable 3 to drive the plug rod 4 to rotate and move upward. This avoids the problem of workpiece vibration, positioning offset, and clamping failure caused by the asynchronous movement of the clamping plate 531 and anti-slip pad 38 due to the disorder of the electrical control timing.

[0048] Example 2, as Figure 13 and Figure 14 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a sealing cover 48 is fixedly connected to the surface of the insertion rod 4, the sealing cover 48 is sleeved on the outer wall of the movable block 34, and the two are in movable contact. A positioning rod 481 is fixedly connected to one side of the sealing cover 48. A positioning groove 381 is provided on the upper surface of the anti-slip pad 38. The dimensions of the positioning groove 381 and the positioning rod 481 are matched. The positioning rod 481 is inserted into the positioning groove 381. The interior of the fixed block 342 is fixedly connected to... An arc-shaped plate 343 is attached. A limiting block is fixedly connected to the side of the anti-slip pad 38 near the fixing block 342. An arc-shaped groove is opened on the side of the fixing block 342 near the anti-slip pad 38. The arc-shaped plate 343 is fixedly installed in the arc-shaped groove, and the limiting block is slidably sleeved on the arc-shaped plate 343. The limiting block is slidably connected to the arc-shaped groove. A first spring 344 is sleeved on the outside of the arc-shaped plate 343. The two ends of the first spring 344 abut against the arc-shaped groove and the limiting block respectively. The first spring 344 applies elastic force to the limiting block.

[0049] Both the arc groove and the arc plate 343 are coaxial with the inner valve seat 6. When the fixed block 342 and the anti-slip pad 38 move out of alignment, the arc plate 343 slides along the inner side of the limiting block, while the arc groove squeezes the first spring 344.

[0050] During use, after the clamping plate 531 fixes the inner valve seat 6, the anti-slip pad 38 also maintains the clamping function of the inner valve seat 6. The subsequent insertion rod 4 needs to continue to rotate and slide on the surface of the top block 23. The clamping plate 531 and the anti-slip pad 38 apply bidirectional radial clamping force to the inner valve seat 6 from different directions. The clamping forces of the two clamping mechanisms are superimposed and interfere with each other. The anti-slip pad 38 and the outer wall of the inner valve seat 6 will generate relative friction and scratches, and cause scratches on the machined outer wall surface of the valve seat, damaging the surface processing quality of the workpiece.

[0051] To avoid the aforementioned technical problems, the working process of this device is as follows: When the insertion rod 4 moves upward and the limiting rod 341 slides in the rising section 451, the insertion rod 4 drives the pressure plate 47 to rise, and simultaneously drives the sealing cover 48 to rise. The sealing cover 48 drives the positioning rod 481 to rise simultaneously. The positioning rod 481 slides in the positioning groove 381 on the upper surface of the anti-slip pad 38. When the limiting rod 341 slides in the rising section 451, the positioning rod 481 disengages from the positioning groove 381, and the anti-slip pad 38 remains in close contact with the inner valve seat 6. Subsequently, the insertion rod 4 continues to rotate and slides on the surface of the top block 23. At the junction of the rising section 451 and the pressing section 452 at the limiting rod 341, the clamping plate 531 fixes the surface of the inner valve seat 6. After fixing, the insert rod 4 slides to the final position on the surface of the top block 23, and the limiting rod 341 moves to the final position of the extrusion section 452, so that the moving block 34 moves on the surface of the upper slider 33, and drives the fixing block 342 and the anti-slip pad 38 to slide synchronously and away from the surface of the inner valve seat 6. After the clamping plate 531 fixes the inner valve seat 6 and the positioning rod 481 disengages from the positioning groove 381, the anti-slip pad 38 and the surface of the inner valve seat 6 remain in contact and continue to rotate with the insertion rod 4. At this time, the limiting rod 341 is still sliding in the rising section 451, and the fixing block 342 slides along the smooth side of the anti-slip pad 38. At the same time, the fixing block 342 compresses the first spring 344. When the extrusion section 452 contacts the limiting rod 341, the extrusion section 452 pushes the moving block 34 away from the inner valve seat 6. The moving block 34 drives the anti-slip pad 38 away from the inner valve seat 6 through the fixed block 342. When the anti-slip pad 38 separates from the inner valve seat 6, it pushes the limiting ring to slide along the arc groove under the action of the first spring 344. The limiting block drives the anti-slip pad 38 to move synchronously until the anti-slip pad 38 and the fixed block 342 are re-aligned. When the insert rod 4 is reset, the anti-slip pad 38 is kept in position by the first spring 344. The insert rod 4 drives the sealing cover 48 to descend, and the sealing cover 48 drives the positioning rod 481 into the positioning groove 381, which can ensure the stability of the anti-slip pad 38 driving the inner valve seat 6 to rotate.

[0052] This device can automatically engage and disengage the positioning rod 481 and the positioning groove 381 following the lifting and lowering action of the insertion rod 4. After the clamping plate 531 locks the workpiece, it can simultaneously release the clamping of the anti-slip pad 38 on the inner valve seat 6, completely eliminating the interference of the bidirectional superimposed clamping of the clamping plate 531 and the anti-slip pad 38, and preventing the anti-slip pad 38 from rubbing against the outer wall of the valve seat when it continues to rotate with the turntable 3, thus preventing scratches on the surface of the processed workpiece.

[0053] Working principle: The inner valve seat 6 is placed on the fixed frame 5. The rotating motor 361 is started, which drives the rotating gear 36 to rotate. Through the meshing transmission of the rotating gear ring 35, the other rotating gears 36 rotate synchronously, driving each rack 37 to move synchronously towards the central axis of the turntable 3. The rack 37 drives the lower slider 371, the insert rod 4, and the upper slider 33 to feed towards the center along the first slide groove 32. The upper slider 33 drives the moving block 34, the fixed block 342, and the anti-slip pad 38 to approach the inner valve seat. 6. On the outer wall, multiple anti-slip pads 38 hug the inner valve seat 6, making the inner valve seat 6 coaxial with the fixed frame 5. Adjust the height of the pressure plate 47 on the insertion rod 4, tighten the bolts to lock the pressure plate 47, and the pressure plate 47 presses against the upper surface of the inner valve seat 6 to complete the workpiece clamping. At this time, the positioning rod 481 on the sealing cover 48 is inserted into the positioning groove 381 of the anti-slip pad 38, and the anti-slip pad 38 and the moving block 34 are rigidly locked. Then, control the robotic arm 11 to drive the milling cutter 12 to mill the exposed part of the inner valve seat 6. After the exposed parts are milled, the robotic arm 11 returns to the processing station and starts the drive motor 22. The drive gear 221 drives the drive gear ring 31, causing the turntable 3 to rotate as a whole. The turntable 3 drives the upper slider 33, the insert rod 4, the moving block 34 and the anti-slip pad 38 to rotate together. The friction generated by the rigid clamping of the anti-slip pad 38 drives the inner valve seat 6 to rotate synchronously. After rotating to the set angle, the processing blind area that was originally blocked by the anti-slip pad 38 rotates to the milling processing position. When the turntable 3 rotates, the lower end of the insert rod 4 contacts the inclined surface of the top block 23. The inclined surface forces the insert rod 4 to rise, stretching the tension spring 46. The upward movement of the insert rod 4 causes the pressure plate 47 to rise, releasing the pressure on the upper surface of the inner valve seat 6. At the same time, the insert rod 4 drives the connecting frame 41, the limiting plate 43, and the sealing cover 48 to move upward synchronously. The sealing cover 48 rises, and the positioning rod 481 is pulled out from the positioning groove 381 of the anti-slip pad 38, releasing the rigid lock between the anti-slip pad 38 and the fixing block 342. At this time, the clamping plate 531 is not yet clamped, and the anti-slip pad 38 is still attached to the outer wall of the inner valve seat 6, and can continue to rotate synchronously with the turntable 3. During the lifting process of the insertion rod 4, the limiting rod 341 first slides along the rising section 451 of the extrusion groove 45. The connecting rod 44 enters the clamping section 422 from the advancing section 421 inside the limiting groove 42. When the limiting rod 341 is at the junction of the rising section 451 and the extrusion section 452, the slope of the clamping section 422 extrudes the connecting rod 44. The push rod 442 is limited by the moving groove 431, the collar 444 compresses the connecting spring 445, and the connecting rod 44 pushes the retaining ring 441, causing the clamping plate 531 to overcome the elastic force of the elastic telescopic rod 53 and move towards the inner valve seat 6. Multiple sets of clamping plates 531 complete the relay rigid clamping of the inner valve seat 6. After the clamping plates 531 clamp the workpiece, the position of the inner valve seat 6 is completely constrained. Insert rod 4 continues to rise along the inclined surface of top block 23, and limit rod 341 slides into extrusion section 452; extrusion section 452 drives limit rod 341 to move moving block 34 and fixed block 342 radially outward. Because positioning rod 481 has disengaged from positioning groove 381, anti-slip pad 38 can slide along arc plate 343, compressing first spring 344. Anti-slip pad 38 adaptively disengages from outer wall of inner valve seat 6, avoiding interference between clamping forces of clamping plate 531 and anti-slip pad 38, which could cause scratches on the outer wall of workpiece. At the same time, the limiting plate 43 moves upward with the connecting frame 41. The slopes on both sides of the moving groove 431 press against the protrusion 443. The protrusion 443 compresses the reset spring and retracts, passing through the moving groove 431. After passing through, the protrusion 443 pops out again and engages with the inner bottom surface of the limiting plate 43. The size of the protrusion 443 is larger than the opening of the moving groove 431, thus limiting the limiting plate 43. Even if the insertion rod 4 temporarily disengages from the top block 23, it will not fall back downward. After the anti-slip pad 38 completely leaves the outer wall of the inner valve seat 6, the drive turntable 3 rotates back to reset. At this time, the inner valve seat 6 is fixed by the clamping plate 531 and will not rotate with the turntable 3. After the turntable 3 returns to the initial position, the protrusion 443 moves to the notch 432 position, and the tension spring 46 pulls the insert rod 4 and the connecting frame 41 to reset downward. The protrusion 443 disengages from the limit plate 43 at the notch 432 and the connecting rod 44 slides back to the forward section 421 along the reset section 424 of the limit groove 42. The extrusion groove 45 moves down with the insertion rod 4, pushing the moving block 34 to move the fixed block 342 and the anti-slip pad 38 closer to the inner valve seat 6. The sealing cover 48 descends synchronously, and the positioning rod 481 re-inserts into the positioning groove 381 of the anti-slip pad 38, restoring the rigid connection between the anti-slip pad 38 and the moving block 34 assembly. The elastic telescopic rod 53 rebounds, pushing the clamping plate 531 and the retaining ring 441 to reset. The clamping plate 531 releases the inner valve seat 6. At this time, the original clamping blind area is aligned with the milling station. The robotic arm 11 starts again to perform supplementary milling on the inner valve seat 6. By repeating the above actions, the milling operation of the entire circumferential area of ​​the valve seat can be completed.

[0054] 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 claimed invention.

Claims

1. A valve seat machining device, characterized in that: Includes a frame (1), one end of which is provided with a robotic arm (11), on which a milling cutter (12) is provided. A fixed plate (2) is fixedly connected to the surface of the frame (1), and a turntable (3) is rotatably connected to the upper surface of the fixed plate (2). A plurality of first grooves (32) are arranged in an array on the upper surface of the turntable (3). An upper slider (33) is slidably connected inside each first groove (32). A moving block (34) is slidably connected to the upper surface of each upper slider (33). One end of the plate (2) is fixedly connected to a fixing block (342), and the side of the fixing block (342) is slidably connected to an anti-slip pad (38). Each upper slider (33) is slidably connected to an insert rod (4), and the surface of the insert rod (4) is slidably connected to a pressure plate (47). The bottom of the inner cavity of the fixing plate (2) and the inner side of the turntable (3) is fixedly connected to a fixing frame (5). The upper surface of the fixing frame (5) is provided with several second slide grooves (51) in a circumferential array. The interior of the second slide groove (51) is slidably connected to a clamping plate (531).

2. The valve seat machining device according to claim 1, characterized in that: A drive motor (22) is fixedly connected to the lower surface of the fixed plate (2), and a drive gear (221) is fixedly connected to the output end of the drive motor (22). A drive gear ring (31) is fixedly connected to the outer wall of the turntable (3). The surfaces of the drive gear ring (31) and the drive gear (221) mesh with each other. A fixed cover (21) is fixedly connected to the upper surface of the fixed plate (2). The drive gear ring (31) and the drive gear (221) are both located inside the fixed cover (21).

3. The valve seat machining device according to claim 2, characterized in that: The inner sidewall of the turntable (3) is rotatably connected to a rotating gear ring (35), the inner bottom of the turntable (3) is rotatably connected to a rotating gear (36), the inner bottom of the turntable (3) is slidably connected to a rack (37), the rack (37) and the rotating gear ring (35) respectively mesh with the rotating gear (36), the inner wall of the turntable (3) is fixedly connected to a rotating motor (361), the output end of the rotating motor (361) is fixedly connected to the rotating end of one of the rotating gears (36), one end of the rack (37) is fixedly connected to a lower slider (371), and the insert rod (4) is located inside the upper slider (33) and the lower slider (371).

4. The valve seat machining device according to claim 3, characterized in that: Several support plates (52) are fixedly connected to the bottom inner side of the fixed plate (2) and the inner side of the fixed frame (5). Each support plate (52) has an elastic telescopic rod (53) fixedly connected to one side of the support plate (52) and the inside of the second slide groove (51). The telescopic end of the elastic telescopic rod (53) is fixedly connected to the inside of the clamping plate (531).

5. The valve seat machining device according to claim 4, characterized in that: The bottom inner side of the fixed plate (2) is fixedly connected with several top blocks (23) in a ring array. The upper surface of the top block (23) is provided with an inclined surface. The outside of the insert rod (4) is fitted with a tension spring (46). The lower end of the tension spring (46) is fixedly connected to the upper surface of the lower slider (371). Each of the first slide groove (32) and the second slide groove (51) is equipped with a sealing strip (321). The sealing strip (321) is a wavy folded plate.

6. The valve seat machining device according to claim 5, characterized in that: The insertion rod (4) is externally fixedly connected to a connecting frame (41). The upper end of the tension spring (46) is fixedly connected to the lower part of the connecting frame (41). A limiting plate (43) is symmetrically fixedly connected to the side of the connecting frame (41) near the fixed frame (5). A moving groove (431) is provided inside the limiting plate (43). A push rod (442) is slidably connected inside the two symmetrical moving grooves (431). A collar (444) is fixedly connected to the surface of the push rod (442). A connecting rod (44) is slidably connected inside the collar (444). The connecting rod (44) has a groove inside, and a connecting spring (445) is fixedly connected between the inner wall of the groove and one side of the collar (444). One end of the connecting rod (44) is slidably connected to the inner wall of the clamp (531). Both sides of the moving groove (431) are set as slopes. The moving groove (431) has a notch (432) inside. A retaining ring (441) is fixedly connected to the surface of the connecting rod (44). A protrusion (443) is slidably connected inside the connecting rod (44) by a spring. The lower surface of the protrusion (443) is set as a slope.

7. A valve seat machining device according to claim 6, characterized in that: The connecting frame (41) is provided with a limiting groove (42) on the side near the fixed frame (5). The limiting groove (42) and one end of the connecting rod (44) are slidably connected. The limiting groove (42) includes a forward section (421). A clamping section (422) is provided on one side of the forward section (421). A backward section (423) is provided on the lower side of the clamping section (422). A reset section (424) is provided on the upper side of the backward section (423). The groove depth of the reset section (424) is shallower than the groove depth of the forward section (421). The interior of the backward section (423) is provided with a slope.

8. The valve seat machining device according to claim 7, characterized in that: The surface of the insert (4) is provided with a pressing groove (45), and a limiting rod (341) is slidably connected inside the pressing groove (45). The limiting rod (341) is fixedly connected to the inner wall of the moving block (34). The pressing groove (45) includes a rising section (451), and a pressing section (452) is provided on the lower side of the rising section (451).

9. A valve seat machining device according to claim 1, characterized in that: A sealing cover (48) is fixedly connected to the surface of the insert (4). The sealing cover (48) is sleeved on the outer wall of the moving block (34). A positioning rod (481) is fixedly connected to one side of the sealing cover (48). A positioning groove (381) is provided on the upper surface of the anti-slip pad (38). The dimensions of the positioning groove (381) and the positioning rod (481) are matched.

10. A valve seat machining device according to claim 9, characterized in that: An arc-shaped plate (343) is fixedly connected inside the fixed block (342), and the back side of the anti-slip pad (38) is slidably connected to the surface of the arc-shaped plate (343). A first spring (344) is fixedly connected between the back side of the anti-slip pad (38) and the inner wall of the fixed plate (2).

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