A clamping device and clamping inspection method for a high-pressure movable elbow.

Abstract

This invention relates to a clamping device and a clamping detection method, specifically to a clamping device and a clamping detection method for a high-pressure movable elbow. The clamping device includes multiple assembly tables arranged in parallel. Its key feature is that each assembly table has a positioning seat, and a fixing fixture is mounted on the positioning seat. An A-end detection mechanism is mounted on the positioning seat above the fixing fixture; a B-end detection mechanism is mounted on the assembly table beside the positioning seat. This clamping device and method can position the high-pressure movable elbow through detection and correction, and simultaneously control the feed rate of the milling cutter through detection, effectively preventing damage to the milling cutter or the high-pressure movable elbow due to excessive feed rate. By using the fixing fixture, the two ends of the high-pressure movable elbow can be machined separately without disassembling the elbow, greatly facilitating machining. This solves the problem that existing fixtures are not suitable for CNC lathes and are inconvenient for machining.

Description

Technical Field

[0001] This invention relates to a clamping device and a clamping detection method, specifically to a clamping device and a clamping detection method for a high-pressure movable elbow. Background Technology

[0002] High-pressure pipelines are used in oil extraction and transportation to transport oil products. During the installation of high-pressure pipelines, elbows are inevitably needed for turning or obstacle avoidance. High-pressure swivel elbows are widely used because their rotatable nature greatly facilitates the installation of high-pressure pipelines. The manufacturing process of high-pressure swivel elbows includes casting, pipe bending, rough milling, finish milling, and assembly. Rough milling involves turning the inner and outer walls of the elbow end. To protect the milling cutter and the elbow, the position of the high-pressure swivel elbow needs to be corrected before it is clamped onto the lathe, and the inner and outer walls of the elbow end need to be inspected. Through correction and inspection, the feed rate of the milling cutter is controlled to prevent excessive feed rate, which could cause the milling cutter to collide directly with the elbow and cause damage.

[0003] Patent application CN116511953A discloses a composite fixture for quick clamping and measurement of elbows, including a base. The base comprises a rotating part and an inclined part. One end of the rotating part is connected to a machine tool, and the other end is fixedly connected to the inclined part. The included angle between the inclined part and the rotating part is consistent with the included angle between the two ends of the elbow joint to be processed. The inclined part has a positioning hole, and a positioning pin is detachably connected to the positioning hole. A clamping block for clamping the elbow joint to be processed is provided at the positioning hole. The purpose of this patent is to solve the problem that existing technologies require auxiliary equipment to measure non-standard elbows, making it impossible to achieve simple and rapid measurement.

[0004] The aforementioned fixture can clamp and measure elbows, but it has the following drawbacks, making it inconvenient to process the elbows after clamping: 1. Since the fixture only clamps the ends of the elbows, after machining one end, machining the other end requires disassembling the elbow, reversing its direction, and then clamping it again; 2. The fixture only clamps the elbows and does not inspect the inner and outer walls. The feed rate of the milling cutter needs to be controlled by tool setting, making it only suitable for manual lathes, not CNC lathes. Therefore, it is necessary to design a clamping device and clamping inspection method for high-pressure movable elbows to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a clamping device and clamping and testing method for high-pressure movable elbows that are easy to clamp, calibrate, and test, and are also easy to process.

[0006] The technical solution of this invention is:

[0007] A clamping device for a high-pressure movable elbow includes multiple assembly tables arranged in parallel. The device is characterized in that: a positioning seat is provided on the assembly table, a fixing fixture is provided on the positioning seat, an A-end port detection mechanism is provided on the positioning seat above the fixing fixture, and a B-end port detection mechanism is provided on the assembly table next to the positioning seat.

[0008] The positioning seat is U-shaped, with a lead screw threaded onto one end of the positioning seat. A push plate is movably mounted on the lead screw end between the positioning seats via a bearing. A handwheel is provided on the lead screw end on the outer side of the positioning seat. A positioning plate is provided on the positioning seat opposite the push plate, and a positioning port is provided on the other end of the positioning seat above the positioning plate.

[0009] The bottom of the positioning seat is provided with a positioning waist hole.

[0010] The A-end port detection mechanism includes a rotating arm, an A-end slide rod, an A-end detection probe, a limiting block, and an outer circle detection strip. The A-end slide rod is slidably inserted into one end of the rotating arm, and the A-end detection probe is threaded onto one end of the A-end slide rod. The limiting block is installed on the other end of the A-end slide rod by a fixing bolt, and the outer circle detection strip is fixed on the limiting block by a fixing bolt. The other end of the rotating arm is movably connected to the positioning port by a pin.

[0011] An adjusting screw is threaded onto the rotating arm on one side of the positioning port.

[0012] The B-end port detection mechanism includes an L-shaped support plate, a B-end slide rod, and a B-end detection probe. The B-end slide rod is movably inserted into one end of the L-shaped support plate, and the B-end detection probe is threaded onto the end of the B-end slide rod on one side of the positioning seat. The L-shaped support plate is fixedly connected to the assembly table by fixing bolts.

[0013] The fixed fixture includes a support base, a clamping plate, and a straightening plate. The support base is an L-shaped box with openings on the top and sides. The clamping plates are installed on both ends of the support base by fixing bolts. The straightening plate is installed on the support base on the opposite side of the clamping plate by fixing bolts.

[0014] The inner end face of the clamping plate is arc-shaped; the correction plate is V-shaped, and an adjustment screw is threaded on the correction plate, with the end of the adjustment screw extending between the correction plate and the clamping plate.

[0015] The support base is provided with positioning blocks on its bottom end face and side end face respectively. The positioning block at the bottom of the support base is inserted into the positioning waist hole. The front end face of the support base is abutted against the positioning plate, and the rear end face of the support base is abutted against the push plate.

[0016] Furthermore, the L-shaped support plate and the rotating arm are respectively equipped with a through-type hollow shaft motor, and the output shaft of the through-type hollow shaft motor is equipped with a buckle for locking the relative position of the output shaft of the through-type hollow shaft motor and the slide rod.

[0017] Furthermore, displacement sensors are respectively provided on the A-end detection probe, the B-end detection probe, and the outer circle detection strip.

[0018] A clamping and testing method for a high-pressure movable elbow, characterized by the following steps:

[0019] 1) Align the positioning block of the fixing fixture of the clamping device of the high pressure movable elbow with the positioning waist hole, so that the clamping plate at one end of the support base faces the B end port detection mechanism, and insert the fixing fixture between the push plate and the positioning plate of the positioning base on one of the assembly tables.

[0020] 2) Turn the handwheel, which drives the lead screw to rotate, causing the lead screw to push the push plate. The push plate and the positioning plate clamp and fix the fixture on the positioning seat, thus positioning the fixture.

[0021] 3) Remove the clamps at both ends of the support base and unscrew the adjustment screws on the calibration plate until their ends are flush with the end face of the calibration plate.

[0022] 4) Insert the high-pressure movable elbow into the support base, so that the two ends of the high-pressure movable elbow abut against the correction plate respectively;

[0023] 5) Install the clamping plate using fixing bolts, and clamp the two ends of the high-pressure movable elbow between the correction plate and the clamping plate respectively;

[0024] 6) Tighten the adjustment screws on the correction plates at both ends of the support base to initially fix the high-pressure movable elbow using the adjustment screws and clamps;

[0025] 7) Flip the rotating arm of the A-end port detection mechanism to rotate the A-end detection probe to the port above the high-pressure movable elbow; when the rotating arm is rotated to the position, the A-end slide rod slides down under its own gravity, driving the A-end detection probe to insert into the top port of the high-pressure movable elbow; when the A-end slide rod slides down, it simultaneously drives the outer circle detection strip to slide down to the outside of the top port of the high-pressure movable elbow through the limit block.

[0026] 8) By rotating the slide bar at end A, the detection probe at end A and the outer circle detection strip are rotated. During the rotation, the distance between the inner wall of the high-pressure movable elbow and the end of the detection probe at end A, as well as the distance between the outer wall of the high-pressure movable elbow and the end of the outer circle detection strip are detected.

[0027] 9) Push the slide bar at end B, which will cause the detection probe at end B to be inserted into the bottom port of the high-pressure movable elbow. Rotate the slide bar at end B, which will cause the detection probe at end B to rotate. During the rotation, detect the distance between the inner wall of the high-pressure movable elbow and the end of the detection probe at end B.

[0028] 10) Based on the changes in the distance between the inner wall of the high-pressure movable elbow and the end of the A-end detection probe, the distance between the outer wall of the high-pressure movable elbow and the end of the outer circle detection strip, and the distance between the inner wall of the high-pressure movable elbow and the end of the B-end detection probe, loosen the adjustment screw and adjust the position of the high-pressure movable elbow. After the adjustment is completed, lock the position of the high-pressure movable elbow again by adjusting the adjustment screw.

[0029] 11) Repeat steps 8)-10) until the distance between the inner walls of both ends of the high-pressure movable elbow and the detection probe is uniform;

[0030] 12) Turn the handwheel to loosen the push plate and remove the fixed high-pressure movable elbow and the fixed fixture together. Use the fixed fixture to fix the high-pressure movable elbow on the CNC lathe.

[0031] 13) Set the feed rate of the milling cutter according to the distance between the ends of the detection probes at end B, and perform turning machining on the inner wall of the bottom port of the high-pressure movable elbow;

[0032] 14) The feed rate of the milling cutter is set by the distance between the end of the detection probe and the inner wall of the high-pressure movable elbow, and the distance between the outer wall of the high-pressure movable elbow and the end of the outer circle detection strip, respectively, to perform turning machining on the inner and outer walls of the top port of the high-pressure movable elbow.

[0033] 15) Repeat steps 1)-11) to clamp and fix the new high-pressure movable elbow on another assembly table. After the high-pressure movable elbow in the CNC lathe is processed, repeat steps 12)-14) to process the high-pressure movable elbow on the other assembly table. Use the assembly tables alternately to process the high-pressure movable elbow continuously.

[0034] The beneficial effects of this invention are as follows:

[0035] The clamping device and method for this high-pressure movable elbow can position the elbow through detection and calibration, and simultaneously control the feed rate of the milling cutter through detection, effectively preventing damage to the milling cutter or the high-pressure movable elbow due to excessive feed rate. By using a fixed fixture, the two ends of the high-pressure movable elbow can be machined separately without disassembling it, greatly simplifying the machining process. This solves the problem that existing fixtures are not suitable for CNC lathes and are inconvenient for machining. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the positioning base of the present invention;

[0038] Figure 3 yes Figure 2 A top-down view;

[0039] Figure 4 yes Figure 1 Enlarged view of point A in the middle;

[0040] Figure 5 This is a schematic diagram of the structure of the fixing fixture of the present invention;

[0041] Figure 6 yes Figure 5 A left-view diagram;

[0042] Figure 7 This is an assembly diagram of the through-type hollow shaft motor of the present invention;

[0043] Figure 8 This is an assembly diagram of the displacement sensor of the present invention.

[0044] In the diagram: 1. Assembly table, 2. Positioning seat, 3. Lead screw, 4. Push plate, 5. Handwheel, 6. Positioning plate, 7. Positioning port, 8. Positioning waist hole, 9. Rotating arm, 10. A-end slide bar, 11. A-end detection probe, 12. Limiting block, 13. Outer circle detection strip, 14. Adjusting screw, 15. L-shaped support plate, 16. B-end slide bar, 17. B-end detection probe, 18. Support seat, 19. Clamping plate, 20. Correction plate, 21. Adjustment screw, 22. Positioning block, 23. Through-type hollow shaft motor, 24. Buckle, 25. Displacement sensor. Detailed Implementation

[0045] The clamping device for the high-pressure movable elbow includes multiple assembly tables 1 arranged in parallel, which are used alternately to assemble, disassemble, and fix the high-pressure movable elbow. This allows one high-pressure movable elbow to be clamped and inspected on the assembly table while the other is being machined on the CNC lathe. Furthermore, when the high-pressure movable elbow is disassembled on the assembly table after machining, the other high-pressure movable elbow can be quickly removed from the assembly table and loaded into the CNC lathe. This speeds up the production cycle and effectively improves production efficiency.

[0046] A positioning seat 2 is installed on the assembly table 1, and a fixing fixture is installed on the positioning seat 2. An A-end port detection mechanism is installed on the positioning seat 2 above the fixing fixture to detect one end of the high-pressure movable elbow. This detection mechanism controls the feed rate of the milling cutter, preventing excessive feed rate from damaging the cutter and insufficient feed rate from causing low machining efficiency. A B-end port detection mechanism is installed on the assembly table 1 next to the positioning seat 2 to detect the other end of the high-pressure movable elbow. The B-end port detection mechanism, in conjunction with the A-end port detection mechanism, accurately corrects the position of the high-pressure movable elbow, ensuring accurate clamping. Simultaneously, by detecting and controlling the feed rate of the milling cutter when machining that end of the high-pressure movable elbow, it ensures that the milling cutter is not damaged while maintaining machining efficiency. The positioning seat 2 is used to position and fix the fixed fixture, ensuring that the position of the fixed fixture does not change when the high-pressure movable elbow is clamped on it, thus guaranteeing the accuracy of clamping the high-pressure movable elbow. At the same time, fixing the fixed fixture facilitates its assembly and disassembly. The fixed fixture's function is to load and position the high-pressure movable elbow, clamping it securely inside the CNC lathe. This external clamping of the high-pressure movable elbow avoids repeated adjustments to its position on the CNC lathe, thereby improving production efficiency.

[0047] The positioning seat 2 is U-shaped. A lead screw 3 is threaded onto one end of the positioning seat 2. A push plate 4 is movably mounted on the end of the lead screw 3 between the positioning seats 2 via a bearing. A handwheel 5 is provided on the end of the lead screw 3 on the outer side of the positioning seat 2. A positioning plate 6 is provided on the positioning seat 2 opposite to the push plate 4. A positioning port 7 is provided on the other end of the positioning seat 2 above the positioning plate 6. A positioning waist hole 8 is provided at the bottom of the positioning seat 2. The function of the lead screw 3 is to push the push plate 4 between the positioning plate 6 as the handwheel 5 drives the lead screw 3 to rotate, thereby clamping and fixing the fixed fixture between the push plate 4 and the positioning plate 6, thus positioning and fixing the fixed fixture.

[0048] The A-end port detection mechanism includes a rotating arm 9, an A-end slide rod 10, an A-end detection probe 11, a limiting block 12, and an outer circle detection strip 13. The A-end slide rod 10 is slidably inserted into one end of the rotating arm 9, and the A-end detection probe 11 is threaded onto one end of the A-end slide rod 10. The limiting block 12 is installed on the other end of the A-end slide rod 10 by a fixing bolt, and the outer circle detection strip 13 is fixedly installed on the limiting block 12 by a fixing bolt. The other end of the rotating arm 9 is movably connected to the positioning port 7 by a pin. The function of the A-end slide bar 10 is twofold: firstly, it drives the A-end detection probe 11 to slide back and forth, thereby avoiding interference during the assembly of the high-pressure movable elbow and facilitating its installation; secondly, the A-end slide bar 10 drives the A-end detection probe 11 to rotate, and the change in the distance between the tip of the A-end detection probe 11 and the inner wall of the high-pressure movable elbow reflects whether the high-pressure movable elbow is properly clamped, thus correcting its position; simultaneously, the change in the distance between the tip of the A-end detection probe 11 and the inner wall of the high-pressure movable elbow reflects the change in the inner wall thickness of the high-pressure movable elbow, and the feed rate of the CNC lathe milling cutter is adjusted accordingly based on the change in the inner wall thickness of the high-pressure movable elbow. The function of the outer diameter detection strip 13 is to detect the outer wall of the end of the high-pressure movable elbow. During the rotation of the outer diameter detection strip 13 driven by the slide rod 10 at end A through the limit block 12, the change in the distance between the end of the outer diameter detection strip 13 and the outer diameter of the high-pressure movable elbow assists the detection probe 11 at end A in detecting the inner wall of the high-pressure movable elbow and judging whether the high-pressure movable elbow is properly corrected. At the same time, the change in the distance between the end of the outer diameter detection strip 13 and the outer diameter of the high-pressure movable elbow reflects the change in the thickness of the outer diameter of the end of the high-pressure movable elbow, thereby controlling the feed rate of the milling cutter when turning the outer diameter of the high-pressure movable elbow. For example: When the A-end detection probe 11 comes into contact with the inner wall of the high-pressure movable elbow during rotation, and when the A-end detection probe 11 continues to rotate to the inner wall of the high-pressure movable elbow on the opposite side of the contact point, the distance between the inner wall of the high-pressure movable elbow on the opposite side of the contact point and the end of the A-end detection probe 11 is 10mm. At this time, it can be determined that the inner wall of the high-pressure movable elbow is deviated too much, the clamping of the high-pressure movable elbow is incorrect, and the position of the high-pressure movable elbow needs to be corrected.

[0049] An adjusting screw 14 is threaded onto the rotating arm 9 on one side of the positioning port 7. The function of the adjusting screw 14 is to support the rotating arm 9 against the positioning port 7 when the A-end detection probe 11 rotates above the high-pressure movable elbow port. This supports the A-end slide rod 10, the A-end detection probe 11, the limit block 12, and the outer circle detection strip 13 in sequence. At the same time, the pitch of the rotating arm 9 is adjusted by adjusting the height of the adjusting screw 14 to ensure that the A-end slide rod 10 is in a vertical state, thereby ensuring the accuracy of the A-end detection probe 11 during detection.

[0050] The B-end port detection mechanism includes an L-shaped support plate 15, a B-end slide rod 16, and a B-end detection probe 17. The B-end slide rod 16 is movably inserted into one end of the L-shaped support plate 15, and the B-end detection probe 17 is threaded onto the end of the B-end slide rod 16 on one side of the positioning seat 2. The L-shaped support plate 15 is fixedly connected to the assembly table 1 by fixing bolts. The function of the B-end detection probe 17 is to detect the port of the high-pressure movable elbow, thereby correcting the position of the high-pressure movable elbow port. It works in conjunction with the A-end detection probe 11 to detect the other end of the high-pressure movable elbow port, thus correcting the other end of the high-pressure movable elbow port and correcting the position of both ends of the high-pressure movable elbow. Simultaneously, by detecting the port of the high-pressure movable elbow port through the B-end detection probe 17, the feed rate of the milling cutter is controlled when turning that end of the high-pressure movable elbow.

[0051] The fixture includes a support base 18, a clamping plate 19, and a straightening plate 20. The support base 18 is an L-shaped box with openings at the top and sides. The clamping plate 19 is mounted on both ends of the support base 18 by fixing bolts. The straightening plate 20 is mounted on the support base 18 on the opposite side of the clamping plate 19 by fixing bolts. The function of the clamping plate 19 is to clamp the end of the high-pressure movable elbow by working in conjunction with the straightening plate 20, thereby positioning and fixing the high-pressure movable elbow.

[0052] The inner end face of the clamping plate 19 is arc-shaped; the straightening plate 20 is V-shaped, and an adjusting screw 21 is threaded onto the straightening plate 20, with the end of the adjusting screw 21 extending between the straightening plate 20 and the clamping plate 19. The function of the adjusting screw 21 is to press the high-pressure movable elbow onto the clamping plate 19 by pressing the high-pressure movable elbow with the adjusting screw 21 on the straightening plate 20, thereby fixing the end of the high-pressure movable elbow with the clamping plate 19.

[0053] Positioning blocks 22 are respectively provided on the bottom end face and the side end face of the support base 18. The positioning block 22 at the bottom of the support base 18 is inserted and connected to the positioning waist hole 8. The front end face of the support base 18 is abutted and connected to the positioning plate 6, and the rear end face of the support base 18 is abutted and connected to the push plate 4. The function of the positioning block 22 is, on the one hand, to further position the fixed fixture on the positioning base 2 by cooperating with the positioning waist hole 8, so as to ensure the accurate positioning of the fixed fixture, thereby ensuring the accuracy of the inspection of the high-pressure movable elbow clamped in the fixed fixture; on the other hand, the positioning block 22 can facilitate the connection between the fixed fixture and the three-jaw chuck of the CNC lathe, so as to facilitate the fixing of the high-pressure movable elbow in the CNC lathe.

[0054] The clamping and testing method for this high-pressure movable elbow includes the following steps:

[0055] Align the positioning block 22 of the clamping fixture for the high-pressure movable elbow with the positioning hole 8, so that the clamping plate 19 at one end of the support base 18 faces the B-end port detection mechanism. Insert the clamping fixture between the push plate 4 and the positioning plate 6 of the positioning base 2 on one of the assembly tables 1. After the support base 18 of the clamping fixture is inserted into place, turn the handwheel 5. The handwheel 5 drives the lead screw 3 to rotate. Under the action of the thread between the lead screw 3 and the positioning base 2, the end of the lead screw 3 moves towards the positioning plate 6, causing the lead screw 3 to push the push plate 4. The push plate 4 and the positioning plate 6 clamp and fix the clamping fixture on the positioning base 2, thus fixing and positioning the clamping fixture.

[0056] After fixing the fixture, remove the clamping plates 19 at both ends of the support base 18. Since the fixture is fixed on the positioning base 2, it is not easy to move the fixture when removing the clamping plates 19, making it convenient to remove the clamping plates 19. After removing the clamping plates 19, unscrew the adjusting screws 21 on the correction plate 20 until their ends are flush with the end face of the correction plate 20. After the adjusting screws 21 are tightened to the correct position, insert the high-pressure movable elbow into the support base 18, so that the two ends of the high-pressure movable elbow abut against the correction plate 20 respectively. Install the clamping plates 19 using the fixing bolts, clamping the two ends of the high-pressure movable elbow between the correction plate 20 and the clamping plates 19 respectively. After the clamping plate 19 is installed in place, the adjustment screws 21 on the correction plates 20 at both ends of the support base 18 are turned. The adjustment screws 21 press the high-pressure movable elbow, so that the circumferential surface of the high-pressure movable elbow abuts against the clamping plate 19. Then, the high-pressure movable elbow is initially fixed by the adjustment screws 21 and the clamping plate 19.

[0057] After initially fixing the high-pressure movable elbow, the rotating arm 9 of the A-end port detection mechanism is flipped to rotate the A-end detection probe 11 above the port of the high-pressure movable elbow. When the rotating arm 9 is in position, the A-end slide rod 10 slides down under its own weight, causing the A-end detection probe 11 to insert into the top port of the high-pressure movable elbow. As the A-end slide rod 10 slides down, it simultaneously causes the outer circle detection strip 13 to slide down to the outside of the top port of the high-pressure movable elbow via the limiting block 12. By rotating the A-end slide rod 10, the A-end detection probe 11 and the outer circle detection strip 13 are rotated. During the rotation, the distance between the inner wall of the high-pressure movable elbow and the end of the A-end detection probe 11, as well as the distance between the outer wall of the high-pressure movable elbow and the end of the outer circle detection strip 13, are detected. After the A-end detection probe 11 and the outer circle detection strip 13 complete the end detection of the high-pressure movable elbow, push the B-end slide rod 16. The B-end slide rod 16 then drives the B-end detection probe 17 to insert into the bottom port of the high-pressure movable elbow. Rotate the B-end slide rod 16, which in turn drives the B-end detection probe 17 to rotate. During rotation, the distance between the inner wall of the high-pressure movable elbow and the end of the B-end detection probe 17 is detected. Based on the changes in the distances between the inner wall of the high-pressure movable elbow and the end of the A-end detection probe 11, the outer wall of the high-pressure movable elbow and the end of the outer circle detection strip 13, and the inner wall of the high-pressure movable elbow and the end of the B-end detection probe 17, if the position of the high-pressure movable elbow is determined to be incorrect, loosen the adjustment screw 21 and adjust the position of the high-pressure movable elbow. After adjustment, lock the position of the high-pressure movable elbow again using the adjustment screw 21. Repeat the above-mentioned inspection and adjustment of the high-pressure movable elbow until the distance between the inner wall of both ends of the high-pressure movable elbow and the inspection probe is uniform. At this point, the high-pressure movable elbow is clamped.

[0058] After the high-pressure movable elbow is clamped, turn handwheel 5 to loosen push plate 4, and remove the fixed high-pressure movable elbow and fixture together. Secure the high-pressure movable elbow to the CNC lathe using the fixture. After the high-pressure movable elbow is fixed on the CNC lathe, set the milling cutter feed rate according to the distance between the ends of the B-end detection probe 17, and machine the inner wall of the bottom port of the high-pressure movable elbow. After machining one end of the high-pressure movable elbow, adjust the clamping position of the high-pressure movable elbow on the CNC lathe and lower it. Set the milling cutter feed rate according to the distance between the end of the A-end detection probe 11 and the inner wall of the high-pressure movable elbow, and the distance between the outer wall of the high-pressure movable elbow and the end of the outer circle detection strip 13, respectively, and machine the inner and outer walls of the top port of the high-pressure movable elbow.

[0059] During the machining of the high-pressure movable elbow in the CNC lathe, the clamping and inspection steps of the high-pressure movable elbow are repeated, and a new high-pressure movable elbow is clamped and fixed on another assembly table 1. After the high-pressure movable elbow in the CNC lathe is machined, it is removed from the CNC lathe and fixed on the positioning seat 2 of the assembly table 1. After the high-pressure movable elbow in the CNC lathe is removed, the above machining process is repeated for the high-pressure movable elbow on the other assembly table 1. When machining the high-pressure movable elbow on the other assembly table 1, the machined high-pressure movable elbow is removed from the fixed fixture. The assembly table 1 is used alternately to continuously machine the high-pressure movable elbow.

[0060] As an improvement, a through-type hollow shaft motor 23 is respectively installed on the L-shaped support plate 15 and the rotating arm 9. The output shaft of the through-type hollow shaft motor 23 on the L-shaped support plate 15 is movably connected to the slide bar 16 at end B; the output shaft of the through-type hollow shaft motor 23 on the rotating arm 9 is movably connected to the slide bar 10 at end A. A latch 24 is provided on the output shaft of the through-type hollow shaft motor 23 to lock the relative position of the output shaft of the through-type hollow shaft motor 23 and the slide bar. Displacement sensors 25 are respectively installed on the detection probe 11 at end A, the detection probe 17 at end B, and the outer circle detection strip 13. Because the output shaft of the through-type hollow shaft motor 23 is a hollow shaft, the slide bar at end A can slide back and forth relative to the output shaft of the through-type hollow shaft motor 23. The function of the through-type hollow shaft motor 23 is to drive the slide rods 10 and 16 at the A end and the output shaft of the through-type hollow shaft motor 23 to rotate when the latch 24 locks the relative position of the slide rods 10 and 16 at the A end and the slide rods 16 at the B end. This, in turn, drives the detection probes 11 at the A end, 17 at the B end, and the outer circle detection strip 13 to rotate. During the rotation, the displacement sensor 25 automatically detects the displacement of the detection probes 11 at the A end, 17 at the B end, and the outer circle detection strip 13, thereby automatically detecting the changes in the inner and outer walls of the high-pressure movable elbow. This facilitates the detection, and the data detected by the displacement sensor 25 can be directly generated on the computer, allowing for intuitive observation of the changes in the inner and outer walls of the high-pressure movable elbow.

[0061] The clamping and testing method for this high-pressure movable elbow includes the following steps:

[0062] Align the positioning block 22 of the clamping fixture for the high-pressure movable elbow with the positioning hole 8, so that the clamping plate 19 at one end of the support base 18 faces the B-end port detection mechanism. Insert the clamping fixture between the push plate 4 and the positioning plate 6 of the positioning base 2 on one of the assembly tables 1. After the support base 18 of the clamping fixture is inserted into place, turn the handwheel 5. The handwheel 5 drives the lead screw 3 to rotate. Under the action of the thread between the lead screw 3 and the positioning base 2, the end of the lead screw 3 moves towards the positioning plate 6, causing the lead screw 3 to push the push plate 4. The push plate 4 and the positioning plate 6 clamp and fix the clamping fixture on the positioning base 2, thus fixing and positioning the clamping fixture.

[0063] After fixing the fixture, remove the clamping plates 19 at both ends of the support base 18. Since the fixture is fixed on the positioning base 2, it is not easy to move the fixture when removing the clamping plates 19, making it convenient to remove the clamping plates 19. After removing the clamping plates 19, unscrew the adjusting screws 21 on the correction plate 20 until their ends are flush with the end face of the correction plate 20. After the adjusting screws 21 are tightened to the correct position, insert the high-pressure movable elbow into the support base 18, so that the two ends of the high-pressure movable elbow abut against the correction plate 20 respectively. Install the clamping plates 19 using the fixing bolts, clamping the two ends of the high-pressure movable elbow between the correction plate 20 and the clamping plates 19 respectively. After the clamping plate 19 is installed in place, the adjustment screws 21 on the correction plates 20 at both ends of the support base 18 are turned. The adjustment screws 21 press the high-pressure movable elbow, so that the circumferential surface of the high-pressure movable elbow abuts against the clamping plate 19. Then, the high-pressure movable elbow is initially fixed by the adjustment screws 21 and the clamping plate 19.

[0064] After initially fixing the high-pressure movable elbow, flip the rotating arm 9 of the A-end port detection mechanism to rotate the A-end detection probe 11 to above the port of the high-pressure movable elbow; when the rotating arm 9 is rotated into place, the A-end slide rod 10 slides down under its own gravity, driving the A-end detection probe 11 to insert into the top port of the high-pressure movable elbow; when the A-end slide rod 10 slides down, it simultaneously drives the outer circle detection strip 13 to slide down to the outside of the top port of the high-pressure movable elbow through the limit block 12.

[0065] After the slide bar 10 at end A slides down to its position, it is locked to the output shaft of the through-type hollow shaft motor 23 via the latch 24. After the slide bar 10 at end A is locked, the through-type hollow shaft motor 23 is started. The through-type hollow shaft motor 23 drives the detection probe 11 at end A and the outer circle detection strip 13 to rotate. During the rotation, the displacement sensor 25 detects the displacement of the detection probe 11 at end A and the outer circle detection strip 13, thereby detecting the changes in the inner and outer walls of the high-pressure movable elbow.

[0066] When the A-end detection probe 11 and the outer circle detection strip 13 detect the end of the high-pressure movable elbow, they push the B-end slide rod 16, which in turn drives the B-end detection probe 17 to insert into the bottom port of the high-pressure movable elbow. After the B-end detection probe 17 is inserted into place, the B-end slide rod 16 is locked to the output shaft of the through-type hollow shaft motor 23 via the latch 24. After the B-end slide rod 16 is locked, the through-type hollow shaft motor 23 is started, which drives the B-end detection probe 17 to rotate. During the rotation, the displacement sensor 25 detects the displacement of the B-end detection probe 17 to detect the changes in the inner wall of the high-pressure movable elbow.

[0067] The position of the high-pressure movable elbow is determined by observing changes in the inner and outer walls of both ends. If the elbow is found to be incorrectly positioned, loosen the adjusting screw 21 and adjust its position. After adjustment, re-lock the elbow's position using the adjusting screw 21. Repeat the above checks and adjustments until the distance between the inner walls of both ends and the testing probe is uniform. At this point, the high-pressure movable elbow is properly clamped.

[0068] After the high-pressure movable elbow is clamped, turn handwheel 5 to loosen push plate 4, and remove the fixed high-pressure movable elbow and fixture together. Secure the high-pressure movable elbow to the CNC lathe using the fixture. After the high-pressure movable elbow is fixed on the CNC lathe, set the milling cutter feed rate according to the distance between the ends of the B-end detection probe 17, and machine the inner wall of the bottom port of the high-pressure movable elbow. After machining one end of the high-pressure movable elbow, adjust the clamping position of the high-pressure movable elbow on the CNC lathe and lower it. Set the milling cutter feed rate according to the distance between the end of the A-end detection probe 11 and the inner wall of the high-pressure movable elbow, and the distance between the outer wall of the high-pressure movable elbow and the end of the outer circle detection strip 13, respectively, and machine the inner and outer walls of the top port of the high-pressure movable elbow.

[0069] During the machining of the high-pressure movable elbow in the CNC lathe, the clamping and inspection steps of the high-pressure movable elbow are repeated, and a new high-pressure movable elbow is clamped and fixed on another assembly table 1. After the high-pressure movable elbow in the CNC lathe is machined, it is removed from the CNC lathe and fixed on the positioning seat 2 of the assembly table 1. After the high-pressure movable elbow in the CNC lathe is removed, the above machining process is repeated for the high-pressure movable elbow on the other assembly table 1. When machining the high-pressure movable elbow on the other assembly table 1, the machined high-pressure movable elbow is removed from the fixed fixture. The assembly table 1 is used alternately to continuously machine the high-pressure movable elbow.

[0070] The clamping device and method for this high-pressure movable elbow can position the elbow through detection and calibration, and simultaneously control the feed rate of the milling cutter through detection, effectively preventing damage to the milling cutter or the high-pressure movable elbow due to excessive feed rate. By using a fixed fixture, the two ends of the high-pressure movable elbow can be machined separately without disassembling it, greatly simplifying the machining process. This solves the problem that existing fixtures are not suitable for CNC lathes and are inconvenient for machining.

Claims

1. A clamping and testing method for a high-pressure movable elbow, characterized in that: Includes the following steps: The clamping and testing method is implemented using the clamping device of the high-pressure movable elbow; The clamping device for the high-pressure movable elbow includes multiple assembly tables (1) arranged in parallel. A positioning seat (2) is provided on the assembly table (1). A fixing fixture is provided on the positioning seat (2). An A-end port detection mechanism is provided on the positioning seat (2) above the fixing fixture. A B-end port detection mechanism is provided on the assembly table (1) next to the positioning seat (2). The positioning seat (2) is U-shaped. A lead screw (3) is threaded onto one end of the positioning seat (2). A push plate (4) is movably mounted on the end of the lead screw (3) between the positioning seats (2) via a bearing. A handwheel (5) is provided on the end of the lead screw (3) on the outside of the positioning seat (2). A positioning plate (6) is provided on the positioning seat (2) on the opposite side of the push plate (4). A positioning port (7) is provided on the other end of the positioning seat (2) above the positioning plate (6). A positioning waist hole (8) is provided at the bottom of the positioning seat (2). The fixed fixture includes a support base (18), a clamping plate (19), and a correction plate (20). Positioning blocks (22) are respectively provided on the bottom end face and the side end face of the support base (18). The positioning blocks (22) at the bottom of the support base (18) are inserted into the positioning waist hole (8). The front end face of the support base (18) is abutted against the positioning plate (6), and the rear end face of the support base (18) is abutted against the push plate (4). The inner end face of the clamping plate (19) is arc-shaped; the correction plate (20) is V-shaped, and the correction plate (20) is threaded with an adjustment screw (21), the end of the adjustment screw (21) extends between the correction plate (20) and the clamping plate (19); The A-end port detection mechanism includes a rotating arm (9), an A-end slide bar (10), an A-end detection probe (11), a limiting block (12), and an outer circle detection bar (13). The B-end port detection mechanism includes an L-shaped support plate (15), a B-end slide bar (16), and a B-end detection probe (17). The specific clamping and inspection method is as follows: 1) Align the positioning block (22) of the clamping device fixing fixture of the high pressure movable elbow with the positioning waist hole (8), so that the clamping plate (19) at one end of the support seat (18) faces the B end port detection mechanism, and insert the fixing fixture between the push plate (4) and the positioning plate (6) of the positioning seat (2) on one of the assembly tables (1). 2) Rotate the handwheel (5), which drives the lead screw (3) to rotate, causing the lead screw (3) to push the push plate (4). The push plate (4) and the positioning plate (6) clamp the fixture onto the positioning seat (2) to position the fixture. 3) Remove the clamps (19) at both ends of the support base (18) and unscrew the adjustment screws (21) on the correction plate (20) until their ends are flush with the end face of the correction plate (20); 4) Insert the high-pressure movable elbow into the support base (18) so that the two ends of the high-pressure movable elbow abut against the correction plate (20) respectively; 5) Install the clamping plate (19) by fixing bolts, and clamp the two ends of the high pressure movable elbow between the correction plate (20) and the clamping plate (19) respectively; 6) Tighten the adjustment screws (21) on the correction plates (20) at both ends of the support base (18) respectively, and fix the high pressure movable elbow in the preliminary manner by adjusting the adjustment screws (21) and the clamps (19); 7) Flip the rotating arm (9) of the A-end port detection mechanism to rotate the A-end detection probe to the port above the high-pressure movable elbow; when the rotating arm (9) is rotated to the position, the A-end slide bar (10) slides down under its own gravity, driving the A-end detection probe (11) to insert into the top port of the high-pressure movable elbow; when the A-end slide bar (10) slides down, it simultaneously drives the outer circle detection strip (13) to slide down to the outside of the top port of the high-pressure movable elbow through the limit block (12); 8) By rotating the slide bar (10) at end A, the detection probe (11) at end A and the outer circle detection bar (13) at end A are rotated. During the rotation, the distance between the inner wall of the high-pressure movable elbow and the end of the detection probe (11) at end A and the distance between the outer wall of the high-pressure movable elbow and the end of the outer circle detection bar (13) at end A are detected. 9) Push the B-end slide bar (16) to drive the B-end detection probe (17) to be inserted into the bottom port of the high-pressure movable elbow. Rotate the B-end slide bar (16) to drive the B-end detection probe (17) to rotate. During the rotation, detect the distance between the inner wall of the high-pressure movable elbow and the end of the B-end detection probe (17). 10) Based on the changes in the distance between the inner wall of the high-pressure movable elbow and the end of the A-end detection probe (11), the distance between the outer wall of the high-pressure movable elbow and the end of the outer circle detection strip (13), and the distance between the inner wall of the high-pressure movable elbow and the end of the B-end detection probe (17), loosen the adjustment screw (21), adjust the position of the high-pressure movable elbow, and after the adjustment is completed, lock the position of the high-pressure movable elbow again by adjusting the adjustment screw (21); 11) Repeat steps 8)-10) until the distance between the inner walls of both ends of the high-pressure movable elbow and the detection probe is uniform; 12) Turn the handwheel (5) and release the push plate (4) to remove the fixed high-pressure movable elbow and the fixed fixture together. Fix the high-pressure movable elbow on the CNC lathe using the fixed fixture. 13) Set the feed rate of the milling cutter according to the distance between the ends of the detection probe (17) at end B, and perform turning machining on the inner wall of the bottom port of the high-pressure movable elbow; 14) The feed rate of the milling cutter is set by the distance between the end of the A-end detection probe (11) and the inner wall of the high-pressure movable elbow, and the distance between the outer wall of the high-pressure movable elbow and the end of the outer circle detection strip (13) to perform turning machining on the inner and outer walls of the top port of the high-pressure movable elbow. 15) Repeat steps 1)-11) to clamp and fix the new high-pressure movable elbow on another assembly table. After the high-pressure movable elbow in the CNC lathe is processed, repeat steps 12)-14) to process the high-pressure movable elbow on the other assembly table. Use the assembly tables alternately to process the high-pressure movable elbow continuously.

2. The clamping and testing method for a high-pressure movable elbow according to claim 1, characterized in that: The rotating arm (9) has an A-end slide rod (10) slidably inserted at one end, and an A-end detection probe (11) is threaded onto one end of the A-end slide rod (10). A limit block (12) is installed at the other end of the A-end slide rod (10) by a fixing bolt. An outer circle detection strip (13) is fixed on the limit block (12) by a fixing bolt. The other end of the rotating arm (9) is movably connected to the positioning port (7) by a pin.

3. The clamping and testing method for a high-pressure movable elbow according to claim 2, characterized in that: An adjusting screw (14) is threaded onto the rotating arm (9) on one side of the positioning port (7).

4. The clamping and testing method for a high-pressure movable elbow according to claim 2, characterized in that: The L-shaped support plate (15) is movably inserted with a B-end slide rod (16) at one end, and a B-end detection probe (17) is threaded onto the end of the B-end slide rod (16) on one side of the positioning seat (2); the L-shaped support plate (15) is fixedly connected to the assembly table (1) by fixing bolts.

5. The clamping and testing method for a high-pressure movable elbow according to claim 1, characterized in that: The support base (18) is an L-shaped box with openings on the top and sides. The two ends of the support base (18) are respectively fitted with clamps (19) by fixing bolts. The support base (18) opposite the clamps (19) is fitted with a correction plate (20) by fixing bolts.

6. The clamping and testing method for a high-pressure movable elbow according to claim 4, characterized in that: The L-shaped support plate (15) and the rotating arm (9) are respectively equipped with a through-type hollow shaft motor (23), and the output shaft of the through-type hollow shaft motor (23) is equipped with a buckle (24) for locking the relative position of the output shaft of the through-type hollow shaft motor (23) and the slide rod.

7. The clamping and testing method for a high-pressure movable elbow according to claim 4, characterized in that: Displacement sensors (25) are respectively provided on the A-end detection probe (11), the B-end detection probe (17) and the outer circle detection strip (13).

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