A valve weld automatic cutting method and a valve weld automatic cutting device

Abstract

An efficient automatic valve weld cutting method and device includes the following steps: S1 locking and limiting mechanism clamps the pipeline; S2 centering and clamping mechanism clamps and centers the valve; S3 annular cutting mechanism automatically cuts the valve weld. The automatic valve weld cutting method applied in this solution replaces manual operation, automatically adjusts the tool feed rate and rotary cutting speed to ensure the quality of weld cutting, and has automatic centering, limiting, and fixing mechanisms. It also needs to be adjustable to meet the needs of valves of various sizes. A digital control system can be used to make the cutting process visible and controllable, improve the automation control level of the equipment, and the overall cutting mechanism is integrated, making it flexible and convenient to use, saving operators from tedious manual clamping, calibration and cutting work.

Description

Technical Field

[0001] This invention relates to the field of valve maintenance technology, and in particular to an automatic valve weld cutting method and device. Background Technology

[0002] Valves are crucial components in the fluid transport systems of nuclear power plants. Sealing is their most fundamental function, and preventing internal and external leakage is key to ensuring the safety of the nuclear power plant's piping system. To fully guarantee the sealing function of valves, relevant technical requirements stipulate that for valves carrying high-radioactive fluid parameters, to prevent leakage due to valve damage, the connection between the valve and the pipeline must be sealed by electric welding. In nuclear power plant valves, a ring-shaped sealing weld is typically welded between the valve cover and the valve body to block radioactive fluid from passing through the gap between the valve body and the valve cover, preventing fluid leakage. However, under long-term, harsh, and complex service environments, chemical corrosion of the valve core and stress cracking of the weld frequently occur, posing a significant threat to the safe, efficient, and low-cost operation of on-site equipment. Therefore, regular and necessary inspections and maintenance of nuclear power plant valve facilities are essential. In existing technologies, cutting tools require manual adjustment of the feed rate and an external power source for cutting. Therefore, the cutting device needs to be stopped during the cutting process to adjust the tool feed rate, resulting in reduced cutting efficiency. Summary of the Invention

[0003] To overcome the problems of low cutting efficiency and manual adjustment of tool feed rate in the aforementioned valve cutting devices, this invention aims to provide an automatic valve weld cutting method and device. This invention is achieved through the following technical solution:

[0004] An automatic valve weld cutting method includes the following steps:

[0005] S1: Locking and limiting mechanism clamps the pipe:

[0006] S2: The centering clamping mechanism clamps and centers the valve;

[0007] S3: Circular cutting mechanism automatically cuts valve welds.

[0008] As described above, in an automatic valve weld cutting method, the clamping claws are initially installed on the pipeline. After adjusting the distance between the two clamping claws, the hydraulic cylinder on the clamping claws presses down on the clamping claws to clamp the pipeline. The drive motor in the fastening mechanism drives the fastening bolts to move toward the valve to limit the up-and-down swaying of the valve weld during cutting.

[0009] As described above, in an automatic valve weld cutting method, the radial feed mechanism drives the annular synchronous connecting rod and the clamping and centering module to feed simultaneously to achieve centering of the valve weld. After centering is completed, the clamping and centering module clamps the valve weld.

[0010] As described above, an automatic valve weld cutting method involves the following steps: Cutting: A first drive motor drives a first planetary gear to rotate within a fixed internal gear ring. The cutting mechanism follows the rotation of the spindle gear. The cutting tool in the cutting mechanism continuously cuts the valve weld under automatic feeding by a high-precision feed mechanism. A first air-cooling mechanism blows out cold air, and a first chip removal mechanism removes debris. Grinding: A second drive motor drives a second planetary gear to rotate within a fixed internal gear ring. The grinding mechanism follows the rotation of the second planetary gear. After cutting by the cutting mechanism, a grinding tool in the grinding mechanism grinds the cut valve weld. A second air-cooling mechanism blows out cold air to cool the cutting tool, and a second chip removal mechanism cleans up the discharged debris.

[0011] An automatic valve weld cutting device includes a locking and limiting mechanism for locking the entire cutting device on the valve by being set on both sides of the valve. The locking and limiting mechanism is connected to a clamping and positioning mechanism for positioning and automatically clamping the valve. An annular cutting mechanism for automatically cutting the valve weld is provided on one side of the centering and clamping mechanism.

[0012] As described above, an automatic valve weld cutting device includes an annular cutting mechanism comprising a tool feeding mechanism for automatic tool feeding and cutting and automatic grinding after cutting, and a planetary gear transmission mechanism for causing the tool feeding mechanism to rotate around the valve.

[0013] As described above, an automatic valve weld cutting device includes a planetary gear transmission mechanism comprising a fixed internal gear ring that is fixed itself and used for the tool feed mechanism to perform circumferential motion. The fixed internal gear ring meshes with a first planetary gear for driving the tool feed mechanism to rotate and cut, and a second planetary gear meshes with a second planetary gear for driving the tool feed mechanism to rotate and grind. The tool feed mechanism includes a cutting mechanism connected to the first planetary gear for automatically feeding and cutting the valve weld, and a grinding mechanism connected to the second planetary gear in the tool feed mechanism for automatically grinding the valve weld.

[0014] As described above, an automatic valve weld cutting device includes a cutting mechanism comprising a first tool base for mounting the cutting components of the cutting mechanism. The first tool base is provided with a plurality of first pulleys that support the cutting mechanism and facilitate the sliding of the cutting mechanism along a fixed internal gear ring. The first planetary gear is connected to a first drive motor for driving the first planetary gear to rotate. The cutting mechanism also includes a lathe tool for cutting the valve weld. The lathe tool is connected to a high-precision feed mechanism for controlling the cutting parameters. A first air-cooling mechanism is provided on one side of the high-precision feed mechanism for cooling the tool during cutting. A first chip removal mechanism is provided on one side of the first air-cooling mechanism for adsorbing cutting debris while cooling the tool. The high-precision feed mechanism includes a first servo motor for performing rotational motion and a first ball screw for converting the rotational motion into linear motion to drive the tool feed.

[0015] As described above, an automatic valve weld cutting device includes a grinding mechanism comprising a second tool base for mounting the grinding components of the grinding mechanism. The second tool base is provided with a plurality of second pulleys that support the grinding mechanism and facilitate the sliding of the grinding mechanism along a fixed internal gear ring. A second planetary gear is connected to a second drive motor for rotating the second planetary gear. The grinding mechanism also includes a grinding cutter for grinding the valve weld after cutting. The grinding cutter is connected to a grinding feed mechanism for controlling the grinding depth. A second air-cooling mechanism is provided on one side of the grinding feed mechanism for cooling the tool during grinding. A second chip removal mechanism is provided on one side of the second air-cooling mechanism for adsorbing cutting debris while cooling the tool. The grinding feed mechanism includes a second servo motor for rotating motion and a second ball screw for converting the rotating motion into linear motion to drive the tool feed.

[0016] As described above, an automatic valve weld cutting device includes a centering and clamping mechanism comprising a clamping and centering module for clamping the valve weld. The clamping and centering module is connected to a radial feed mechanism for controlling its movement. The clamping and centering module includes a clamping slider for contacting the valve weld during clamping. A connecting rod is provided between the clamping slider and the radial feed mechanism. The connecting rod is connected to an annular synchronous connecting rod. Several annular synchronous connecting rods are connected together by a connecting rod arc, allowing several clamping sliders to simultaneously push and clamp the valve weld. The radial feed mechanism... The structure includes a third servo motor for rotary motion and a third ball screw for converting the rotary motion into linear motion to drive the clamping and centering module to clamp the valve weld. The locking and limiting mechanism includes a clamping gripper for clamping and locking the pipe. The clamping gripper is connected to a locking power device for pushing the clamping gripper to lock the pipe. A support bracket is provided between the clamping grippers for support. The support bracket is provided with a fastening mechanism for limiting the up-and-down swaying of the entire device. The fastening mechanism includes a fourth drive motor and fastening bolts. A support column is connected between the support bracket and the centering and clamping mechanism.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The automatic valve weld cutting method applied in this solution replaces manual operation, automatically adjusts the tool feed rate and rotary cutting speed to ensure the quality of weld cutting, and has automatic centering, limit, and fixing mechanisms. It also needs to be adjustable to meet the needs of valves of various sizes. A digital control system can be used to make the cutting process visible and controllable, improve the automation control level of the equipment, and integrate the entire cutting mechanism. It is flexible and convenient to use, and can save operators from tedious work such as manual clamping, calibration and cutting.

[0019] 2. This device is equipped with an automatic centering clamping and locking limit mechanism, and is also adjustable to meet the needs of valves of different sizes. The ring cutting mechanism can accurately control the cutting amount and cutting time. The centering clamping mechanism eliminates the need for manual clamping and calibration by operators, greatly improving cutting efficiency.

[0020] 3. The locking and limiting mechanism clamps and fixes the entire cutting equipment, ensuring that the cutting device can be accurately positioned on the valve, avoiding inaccurate cutting due to positional deviation, reducing vibration of the cutting equipment, and improving cutting quality.

[0021] 4. It has automatic chip removal, weld cutting, and tool cooling mechanisms, which facilitates use and maintenance, reduces manual operation time, and extends the service life of the equipment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0023] Figure 1 This is a schematic flowchart of an automatic valve weld cutting method according to the present invention. Figure 1

[0024] Figure 2 This is a three-dimensional schematic diagram of an automatic valve weld cutting device according to the present invention. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of a locking and limiting mechanism for an automatic valve weld cutting device according to the present invention. Figure 3 ;

[0026] Figure 4 An exploded view of an automatic valve weld cutting device according to the present invention. Figure 4 ;

[0027] Figure 5 This is a schematic diagram of the centering and clamping mechanism of an automatic valve weld cutting device according to the present invention. Figure 5 ;

[0028] Figure 6 This is a schematic diagram of the annular cutting mechanism of an automatic valve weld cutting device according to the present invention. Figure 6 ;

[0029] Figure 7 This is a schematic diagram of the annular cutting mechanism of an automatic valve weld cutting device according to the present invention. Figure 7 ;

[0030] Figure 8 This is a schematic diagram of the grinding mechanism of an automatic valve weld cutting device according to the present invention. Figure 8 ;

[0031] Figure 9 This is a schematic diagram of the cutting mechanism of an automatic valve weld cutting device according to the present invention. Figure 9 . Detailed Implementation

[0032] To make the technical problems solved by this application, the technical solutions, and the beneficial effects clearer, this application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0033] Please see Figures 1 to 9The device includes a locking and limiting mechanism 1, which is installed on both sides of the valve to lock the overall cutting device onto the valve. The locking and limiting mechanism 1 is connected to a centering clamping mechanism 2 that automatically clamps the valve weld and positions the overall cutting device so that the clamping center is on the same axis as the circular center of the weld. One side of the centering clamping mechanism 2 is provided with an annular cutting mechanism 3 that automatically cuts around the valve weld. The locking and limiting mechanism ensures that the cutting device can be accurately positioned on the valve, avoiding inaccurate cutting due to positional deviation. The centering clamping mechanism ensures the accuracy of the cutting path by aligning the center of the cutting device with the circular center of the weld. The locking and centering clamping mechanisms work together to prevent the device from shaking during the cutting process, thereby reducing operational errors and potential safety risks. The annular cutting mechanism can automatically rotate and cut around the valve weld, reducing the need for manual intervention and improving production efficiency.

[0034] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the annular cutting mechanism 3 includes a tool feeding mechanism 31 for automatic tool feeding and cutting, and automatic grinding after cutting, and a planetary gear transmission mechanism 32 that drives the tool feeding mechanism 31 to rotate around the valve. The tool feeding mechanism 31 can precisely control the feed speed and depth of the tool, ensuring stability and consistency during the cutting or grinding process. The planetary gear transmission mechanism provides high torque output and precise rotational motion, suitable for uniform cutting and grinding around the valve weld. Compared with other transmission methods, the planetary gear transmission mechanism is more compact, saves space, and is easy to install and use in limited spaces. The annular cutting mechanism achieves efficient, accurate and stable cutting and grinding effects through the synergistic effect of the tool feeding mechanism and the planetary gear transmission mechanism, which is suitable for the automated cutting needs of valve weld cutting.

[0035] Furthermore, as a preferred embodiment of this solution and not a limitation, the planetary gear transmission mechanism 32 includes a fixed internal gear ring 321 that is fixed itself and used for the circular motion of the tool feed mechanism 31. The fixed internal gear ring 321 meshes with a first planetary gear 322 for driving the tool feed mechanism 31 to rotate and cut, and a second planetary gear 326 for driving the tool feed mechanism 31 to rotate and grind. The tool feed mechanism 31 includes a cutting mechanism 311 connected to the first planetary gear 322 for automatically feeding and cutting valve welds, and the second planetary gear 326 connected to the tool feed mechanism 31. The grinding mechanism 312 for automatically grinding valve welds includes a cutting mechanism 311 and a grinding mechanism 312 that are mirror images of each other and distributed on the same side of a fixed internal gear ring 321. Planetary gear transmission provides high-precision position and speed control. The planetary gear structure allows for the transmission of large torque in a small space, which is especially important for driving cutting and grinding tools. By having multiple planetary gears mesh simultaneously, a balanced load distribution can be achieved, reducing vibration and noise and ensuring the smoothness of the processing. The symmetrical layout of the cutting and grinding mechanisms helps to balance the load of the entire system, reduce mechanical stress, and extend the service life of the equipment.

[0036] Furthermore, as a preferred embodiment of this solution and not a limitation, the cutting mechanism 311 includes a first tool base 324 for mounting the cutting components of the cutting mechanism 311. The first tool base 324 is provided with a plurality of first pulleys 325 that support the cutting mechanism 311 and facilitate the sliding of the cutting mechanism 311 along the fixed internal gear ring 321. The first planetary gear 322 is connected to a first drive motor 323 for driving the first planetary gear 322 to rotate. The cutting mechanism 311 also includes a lathe tool 3111 for cutting valve welds. The lathe tool 3111 is connected to a high-precision feed mechanism 3112 for controlling the cutting parameters. A first air-cooling mechanism 3115 is provided on one side of the high-precision feed mechanism 3112 for cooling the tool during cutting. A first air-cooling mechanism 3115 is provided on one side of the tool. The first chip removal mechanism 3116, which cools down the cutting material while simultaneously adsorbing cutting debris, and the high-precision feed mechanism 3112, which includes a first servo motor 3113 for rotary motion and a first ball screw 3114 for converting rotary motion into linear motion to drive the tool feed, ensure the precise feed amount of the cutting tool when cutting valve welds. This helps maintain the accuracy and consistency of the cutting. The first air-cooling mechanism can effectively reduce the temperature of the cutting tool during the cutting process, reduce thermal fatigue wear, extend tool life, and improve cutting efficiency and quality. The first chip removal mechanism promptly removes the debris generated during the cutting process, preventing debris accumulation from affecting the cutting process and keeping the working area clean. The first tool base and the first pulley ensure stable sliding of the cutting mechanism on the fixed internal gear ring, reducing vibration and wear, and enhancing the reliability of the device. The tool feed mechanism can adjust the feed speed and depth according to different cutting requirements, and is suitable for valve welds of various materials and thicknesses.

[0037] Furthermore, as a preferred embodiment of this solution and not a limitation, the grinding mechanism 312 includes a second tool base 327 for mounting the grinding components of the grinding mechanism 312. The second tool base 327 is provided with a plurality of second pulleys 328 that support the grinding mechanism 312 and facilitate the sliding of the grinding mechanism 312 along the fixed internal gear ring 321. The second planetary gear 326 is connected to a second drive motor 329 for driving the second planetary gear 326 to rotate. The grinding mechanism 312 further includes a grinding cutter 3121 for grinding valve welds after cutting. The grinding cutter 3121 is connected to a grinding feed mechanism 3122 for controlling the grinding depth. A second air-cooling mechanism 3125 is provided on one side of the grinding feed mechanism 3122 for cooling the tool during grinding. A second chip removal mechanism 3126 is provided on one side of the second air-cooling mechanism 3125 for simultaneously cooling the tool and adsorbing cutting debris. The grinding feed mechanism 3122 includes a second servo motor 3123 for rotary motion and a second ball screw 3 for converting the rotary motion into linear motion to drive the tool feed. 124. The grinding feed mechanism, through the cooperation of the second servo motor and the second ball screw, can precisely control the feed depth of the grinding tool, ensuring accuracy and consistency during the grinding process. The second air-cooling mechanism can effectively reduce the temperature of the grinding tool during the grinding process, reduce material deformation and tool wear caused by high temperature, and extend the service life of the grinding tool. The second chip removal mechanism promptly removes the chips generated during the grinding process, preventing chips from clogging and interfering with the grinding process, while keeping the working area clean. The second tool base and the second pulley ensure the stable sliding of the grinding mechanism on the fixed internal gear ring 321, reduce vibration, and increase the reliability and durability of the device.

[0038] Furthermore, as a preferred embodiment of this solution and not a limitation, the centering clamping mechanism 2 includes a clamping centering module 21 for clamping the valve weld. The clamping centering module 21 is connected to a radial feed mechanism 22 for controlling the movement of the clamping centering module 21. The clamping centering module 21 includes a clamping slider 211 for contacting the valve weld during clamping. A connecting rod 212 is provided between the clamping slider 211 and the radial feed mechanism 22. The connecting rod 212 is connected to an annular synchronous connecting rod 213. Several annular synchronous connecting rods 213 are connected together by connecting rod arcs 214, so that several clamping sliders 211 simultaneously push the clamping mechanism. The radial feed mechanism 22 for clamping valve welds includes a third servo motor 221 for rotary motion and a third ball screw 222 for converting rotary motion into linear motion to drive the clamping and centering module 21 to clamp the valve weld. The three circular clamping sliders move simultaneously under the action of the annular synchronous connecting rod, which can accurately position the valve weld at the center of the cutting device, ensuring the centering accuracy during the cutting process. The combination of the third servo motor and the third ball screw provides high-precision radial feed control, ensuring that the clamping and centering module can move according to the set route. The clamping and centering module can be adjusted according to the corresponding size of the valve, improving the applicability of the equipment.

[0039] Furthermore, as a preferred embodiment of this solution and not a limitation, the locking and limiting mechanism 1 includes a clamping gripper 11 for clamping and locking the pipe. The clamping gripper 11 is connected to a locking power device 12 for pushing the clamping gripper 11 to lock the pipe. The locking power device is a hydraulic cylinder. A support bracket 13 is provided between the two clamping grippers 11 for supporting the pipe. The support bracket 13 is provided with a fastening mechanism 14 to limit the up-and-down swaying of the entire device. A support column 15 is connected between the support bracket 13 and the centering clamping mechanism 2 so that the entire mechanism can be cut. To maintain stability, the fastening mechanism 14 includes a fourth drive motor 141 and fastening bolts 142. The hydraulic cylinder, as a locking power device, can provide a very large clamping force, ensuring the stable fixation of the pipe during the cutting process and preventing any movement or shaking. The combination of brackets and support columns enhances the rigidity of the overall structure, reduces vibration during the cutting process, and ensures the accuracy and stability of the cutting. The design of the clamping gripper and bracket can be adjusted according to pipes of different diameters, increasing the applicability of the device. By reducing shaking and movement during the cutting process, the flatness and quality of the cutting edge can be significantly improved.

[0040] An automatic valve weld cutting method includes the following three steps: S1 is to lock and limit the pipe with a locking and limiting mechanism 1 to keep the cutting device stable during cutting. After the locking and limiting mechanism 1 clamps the pipe in S1, S2 is to clamp the valve with a centering and clamping mechanism 2 and make the center of the circular weld of the valve and the clamping center of the centering and clamping mechanism 2 on the same axis to ensure that the action trajectory of the tool when cutting along the circumference of the weld is aligned with the axial direction of the circular weld. After the centering and clamping mechanism 2 clamps and aligns the valve in S2, S3 is to automatically cut the valve weld with a ring cutting mechanism 3. During the cutting process, the tool needs to make a circular motion around the center of the weld to cut. At the same time, the valve weld is ground to ensure the cutting quality.

[0041] Step S1 includes the following specific steps: S11 Initially install the clamping gripper 11 on the pipe, adjust the distance between the two clamping grippers 11, and after adjustment, the hydraulic cylinder 12 on the clamping gripper 11 presses the clamping gripper 11 to clamp the pipe. The stable clamping can prevent the device from moving or falling off during processing, ensuring that the device is in a suitable working state. S12 The drive motor 141 in the fastening mechanism drives the fastening bolt 142 to move towards the valve. After pressing the appropriate pressure, the downward movement stops, so that the fastening mechanism 14 restricts the up and down shaking of the entire device during the cutting process, ensuring the accuracy during cutting.

[0042] Step S2 includes the following specific steps: S21 The radial feed mechanism 22 drives the annular synchronous connecting rod 23 and the circular clamping slider to feed simultaneously to achieve centering of the valve weld. S22 After centering is completed, the three circular clamping sliders in the clamping centering module clamp the valve weld together. The annular synchronous connecting rod ensures the synchronous movement of all circular clamping sliders, avoiding deviation or uneven stress caused by unilateral clamping, thereby improving the consistency and reliability of the centering effect.

[0043] Step S3 includes the following specific steps: S31: Cutting. The first drive motor 323 drives the first planetary gear 322 to rotate in the fixed internal gear ring 321. The cutting mechanism 311 rotates with the first planetary gear 322. The cutting tool 3111 in the cutting mechanism 311 automatically cuts the valve weld under the feed of the high-precision feed mechanism 3112. During the cutting process, the first air-cooling mechanism 3115 blows out cold air to cool the tool and the first chip removal mechanism 3116 cleans up the discharged chips. The high-precision feed mechanism 3112 can accurately control the feed amount of the cutting tool 3111 to ensure that the cutting amount in the cutting process meets the set value, improve the cutting accuracy and surface finish. The cutting mechanism can adjust the cutting parameters according to various valve weld types and materials, and has wide applicability. S32: Grinding. The second drive motor 329 drives the second planetary gear 326 to rotate in the fixed internal gear ring 321. The grinding mechanism 312 rotates with the second planetary gear 326. After the cutting mechanism 311 cuts, the grinding tool 3121 in the grinding mechanism 312 grinds the cut valve weld. The second air cooling mechanism 3125 blows out cold air to cool the tool, and the second chip removal mechanism 3126 cleans the discharged chips. Driven by the second planetary gear 326, the grinding tool 3121 can accurately grind the cut weld, remove burrs and unevenness, and improve the valve cutting quality.

[0044] The working principle of this embodiment is as follows:

[0045] An automatic valve weld cutting method and device are disclosed. The clamping gripper in the locking and limiting mechanism is locked onto the pipeline. After locking, the radial feed mechanism in the centering and clamping mechanism is controlled to move and clamp the centering module. Under the action of the annular synchronous linkage, three circular clamping sliders move synchronously to clamp the valve. The drive motor in the annular cutting mechanism drives the tool feed mechanism to rotate. The cutting mechanism in the tool feed mechanism rotates to cut the valve weld. The grinding mechanism grinds the cut valve weld until the valve weld cutting is completed. The tool feed mechanism then stops moving, thus completing the automatic cutting of the valve weld. Precise control of the centering, clamping, and locking mechanisms ensures the stability of the cutting process and the accuracy of the weld cutting. The entire process is controlled by an automated system, reducing the need for manual operation.

[0046] The above are implementation methods provided in conjunction with specific content, and it is not intended that the specific implementation of this application is limited to these descriptions. Any methods or structures that are similar to those of this application, or any technical deductions or substitutions made based on the concept of this application, should be considered within the scope of protection of this application.

Claims

1. A method of automatic cutting of valve welds, characterized in that, Includes the following steps: S1: Locking limit mechanism (1) clamps the pipe; S2: Centering clamping mechanism (2) clamps and centers the valve; S3: Circular cutting mechanism (3) automatically cuts valve welds; Step S2 includes the following specific steps: S21: The radial feed mechanism (22) drives the annular synchronous connecting rod (213) and the clamping centering module (21) to feed simultaneously to achieve the centering of the valve weld; S22, after centering is completed, clamp the centering module (21) to clamp the valve weld; Step S3 includes the following specific steps: S31: Cutting, the first drive motor (323) drives the first planetary gear (322) to rotate in the fixed internal gear ring (321), the cutting mechanism (311) follows the first planetary gear (322) to rotate, the cutting tool (3111) in the cutting mechanism (311) automatically cuts the valve weld under the feed of the high-precision feed mechanism (3112), during the cutting process the first air cooling mechanism (3115) blows out cold air to cool the tool and the first chip removal mechanism (3116) cleans up the discharged chips; S32: Grinding. The second drive motor (329) drives the second planetary gear (326) to rotate in the fixed internal gear ring (321). The grinding mechanism (312) follows the second planetary gear (326) to rotate. After the cutting mechanism (311) cuts, the grinding tool (3121) in the grinding mechanism (312) grinds the valve weld after cutting. The second air cooling mechanism (3125) blows out cold air to cool the tool and the second chip removal mechanism (3126) cleans up the discharged chips.

2. A method of automatic cutting of valve welds according to claim 1, characterized in that, Step S1 includes the following specific steps: S11: Initially install the clamping jaws (11) on the pipeline and adjust the distance between the two clamping jaws (11). After the adjustment is completed, the locking power device (12) on the clamping jaws (11) presses against the clamping jaws (11) to clamp the pipeline. S12: The fourth drive motor (141) in the fastening mechanism (14) drives the fastening bolt (142) to move toward the valve to limit the up-and-down swaying of the valve weld during cutting.

3. An automatic valve weld cutting device, characterized by, The method for automatically cutting valve welds as described in any one of claims 1 to 2 includes a locking and limiting mechanism (1) for locking the overall cutting device on the valve by setting it on both sides of the valve. The locking and limiting mechanism (1) is connected to a centering clamping mechanism (2) that clamps the valve weld so that the clamping center of the overall cutting device and the circular center of the weld are on the same axis. A ring cutting mechanism (3) for rotating and cutting around the valve weld is provided on one side of the centering clamping mechanism (2).

4. An automatic valve weld cutting device according to claim 3, characterized in that... The annular cutting mechanism (3) includes a tool feed mechanism (31) for automatic tool feeding and cutting and automatic grinding after feeding and cutting, and a planetary gear transmission mechanism (32) for rotating the tool feed mechanism (31) around the valve.

5. A valve weld automatic cutting device according to claim 4, characterized in that The planetary gear transmission mechanism (32) includes a fixed internal gear ring (321) that is fixed and used for the tool feed mechanism (31) to make circular motion. The fixed internal gear ring (321) is engaged with a first planetary gear (322) for driving the tool feed mechanism (31) to rotate and cut, and a second planetary gear (326) for driving the tool feed mechanism (31) to rotate and grind. The tool feed mechanism (31) includes a cutting mechanism (311) connected to the first planetary gear (322) for automatically feeding and cutting the valve weld, and a grinding mechanism (312) connected to the second planetary gear (326) in the tool feed mechanism (31) for automatically grinding the valve weld.

6. A valve weld automatic cutting device according to claim 5, characterized in that The cutting mechanism (311) includes a first tool base (324) for mounting the cutting components of the cutting mechanism (311). The first tool base (324) has several first pulleys (325) that support the cutting mechanism (311) and facilitate the sliding of the cutting mechanism (311) along a fixed internal gear ring (321). A first drive motor (323) is connected to the first planetary gear (322) for driving the first planetary gear (322) to rotate. The cutting mechanism (311) also includes a lathe tool (3111) for cutting valve welds. 11) A high-precision feed mechanism (3112) for controlling cutting parameters is connected. The high-precision feed mechanism (3112) is provided with a first air-cooling mechanism (3115) on one side for cooling the tool during cutting. The first air-cooling mechanism (3115) is provided with a first chip removal mechanism (3116) on one side for adsorbing cutting debris while cooling the tool. The high-precision feed mechanism (3112) includes a first servo motor (3113) for rotating motion and a first ball screw (3114) for converting the rotating motion into linear motion to drive the tool feed.

7. A valve weld automatic cutting device according to claim 6, characterized in that The grinding mechanism (312) includes a second tool base (327) for loading the grinding components of the grinding mechanism (312). The second tool base (327) is provided with a plurality of second pulleys (328) that support the grinding mechanism (312) and facilitate the grinding mechanism (312) to slide along the fixed internal gear ring (321). The second planetary gear (326) is connected to a second drive motor (329) for driving the second planetary gear (326) to rotate. The grinding mechanism (312) further includes a grinding tool (3121) for grinding valve welds after cutting. The grinding tool (3121) is connected to a grinding feed mechanism (3122) for controlling the grinding depth. The grinding feed mechanism (3122) has a second air-cooling mechanism (3125) on one side for cooling the tool during grinding. The second air-cooling mechanism (3125) has a second chip removal mechanism (3126) on one side for adsorbing cutting debris while cooling the tool. The grinding feed mechanism (3122) includes a second servo motor (3123) for rotating motion and a second ball screw (3124) for converting the rotating motion into linear motion to drive the tool feed.

8. An automatic valve weld cutting device according to claim 7, characterized in that... The centering and clamping mechanism (2) includes a clamping and centering module (21) for clamping the valve weld. The clamping and centering module (21) is connected to a radial feed mechanism (22) for controlling the movement of the clamping and centering module (21). The clamping and centering module (21) includes a clamping slider (211) for contacting the valve weld during clamping. A connecting rod (212) is provided between the clamping slider (211) and the radial feed mechanism (22). The connecting rod (212) is connected to an annular synchronous connecting rod (213). Several annular synchronous connecting rods (213) are connected together by connecting rod arcs (214) so ​​that several clamping sliders (211) simultaneously push and clamp the valve weld. The radial feed mechanism (22) includes a mechanism for rotational movement. The third servo motor (221) and the third ball screw (222) that converts the rotational motion into linear motion to push the clamping centering module (21) to clamp the valve weld are included. The locking limit mechanism (1) includes a clamping gripper (11) for clamping and locking the pipe. The clamping gripper (11) is connected to a locking power device (12) for pushing the clamping gripper (11) to lock the pipe. A support bracket (13) is provided between the clamping grippers (11). A fastening mechanism (14) for limiting the up-and-down swaying of the entire device is provided on the support bracket (13). The fastening mechanism (14) includes a fourth drive motor (141) and a fastening bolt (142). A support column (15) is connected between the support bracket (13) and the centering clamping mechanism (2).

Images