High-frequency welded pipe outer diameter shaping inspection device

Abstract

The utility model discloses a high-frequency welded pipe outer diameter shaping inspection device which comprises a detection platform, a chuck driving assembly, at least two supporting assemblies, a pressing assembly, a detection assembly and a controller. The chuck driving assembly clamps the end of the welded pipe through a three-jaw chuck and is driven by a driving mechanism to rotate. The supporting assembly is fixed on the platform to support the pipe body; the pressing assembly presses pressing wheels downwards through a lifting driving piece and a hinge support and cooperates with the supporting wheels to limit the welded pipe. The detection assembly adjusts the position of the displacement sensor through the sliding table module and aligns to the suspended section of the welded pipe for non-contact scanning. According to the device, high-precision outer diameter and ovality detection under full-circumference automatic rotation of the welded pipe is realized, the precision reaches + / -0.01 mm, the single-pipe detection time is less than or equal to 1 minute, and the problems of low efficiency and high omission ratio of traditional manual detection are solved.

Description

Technical Field

[0001] This utility model relates to the field of high-frequency welded pipe testing, and in particular to a high-frequency welded pipe outer diameter type testing device. Background Technology

[0002] High-frequency welded pipe is a type of steel pipe formed by instantaneously heating the edges of a steel plate and applying pressure through the skin effect and proximity effect generated by high-frequency current. Its production process is fast and efficient, and it is widely used in construction, machinery, automotive, energy, and other fields, serving as an important component of basic industrial materials. During its production, the welded pipe needs to be rapidly cooled and shaped after forming and welding; its outer diameter accuracy and roundness directly affect subsequent processing and performance.

[0003] Traditional inspection methods have the following main problems: 1. Outdated inspection methods: Manual sampling inspection using calipers or go / no-go gauges is difficult to fully capture dimensional fluctuations in the circumferential direction of the pipe body, resulting in a high rate of missed detection for defects such as ovality and local deformation; 2. Low efficiency: Multiple measurements are required for each welded pipe, which is time-consuming (approximately 3-5 minutes per pipe) and cannot meet the continuous inspection needs of the production line; 3. Large human error: Manual force can easily cause deformation of thin-walled pipes, and contact measurement can cause data distortion.

[0004] Therefore, there is an urgent need for a specialized device that can achieve automatic scanning of the entire circumference of welded pipes and high-precision non-contact inspection to meet the quality control requirements of large-scale production of high-frequency welded pipes. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a high-frequency welded pipe outer diameter type inspection device.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] This utility model discloses a high-frequency welded pipe outer diameter shaping and inspection device, comprising an inspection platform; a chuck drive assembly, disposed above the inspection platform, including a three-jaw chuck for clamping the end of the welded pipe and a drive mechanism, the drive mechanism being fixed to the inspection platform and its output end being drivenly connected to the three-jaw chuck; at least two support assemblies, fixedly installed at intervals along the axial direction of the high-frequency welded pipe on the inspection platform and located below the three-jaw chuck, for supporting the welded pipe body; and a clamping assembly, disposed on the inspection platform and located above the support assemblies, including a wheel seat, at least two clamping wheels rotatably connected to the bottom of the wheel seat, a hinged bracket, and a... The system includes at least one lifting drive component, with one end of the hinged bracket connected to the wheel seat and the other end connected to the piston rod of the lifting drive component; a detection assembly, disposed on the detection platform and located to the side of the support assembly, including a slide module fixed on the detection platform, a sensor mounting base fixedly installed on the slide module, and a displacement sensor fixedly installed on the sensor mounting base, the measuring end of the displacement sensor facing the suspended section of the welded pipe body held by the three-jaw chuck and limited by the support assembly and the clamping assembly; and a controller, fixed to the side of the detection platform and communicatively connected to the drive mechanism, the lifting drive component, and the displacement sensor.

[0008] As a preferred embodiment of this utility model, the support assembly includes a support base and at least two freely rotatable support wheels, the support wheels being mounted on the support base; the wheel surface of the support wheel is planar or has an arc-shaped groove adapted to the outer diameter of the welded pipe.

[0009] As a preferred embodiment of this utility model, the clamping assembly includes two vertically arranged lifting drive components, which are either pneumatic cylinders or hydraulic cylinders; the two lifting drive components are configured to drive synchronously.

[0010] As a preferred embodiment of this invention, the displacement sensor is a point laser displacement sensor or a line laser displacement sensor.

[0011] As a preferred embodiment of this utility model, the slide module is a two-dimensional translational slide, including a first slide that moves in a direction parallel to the welded pipe axis and a second slide that moves in a direction perpendicular to the welded pipe axis. The second slide is mounted on the first slide, and the sensor mounting base is fixedly mounted on the second slide. The slide module is a manually operated slide or an automatic slide driven by a motor.

[0012] As a preferred embodiment of this utility model, the driving mechanism is a servo motor or a stepper motor, and a reduction mechanism or a synchronous belt drive mechanism is provided between its output shaft and the three-jaw chuck.

[0013] As a preferred technical solution of this utility model, the hinged bracket and the wheel seat are connected by a ball joint or a universal joint, so that the wheel seat can adapt to the undulations of the welded pipe surface, thereby driving the pressure wheel to fit against the pipe body.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The welded pipe is driven to rotate at a constant speed by a three-jaw chuck, and the suspended section is continuously scanned 360° by a laser displacement sensor to obtain the diameter and ellipticity data of the entire cross section in real time (accuracy up to ±0.01mm), completely avoiding blind spots in manual sampling inspection.

[0016] 2. The automated clamping-rotation-measurement process reduces the single-tube inspection time to ≤1 minute, and the controller automatically determines the pass / fail status, supporting online continuous inspection;

[0017] 3. Non-contact laser sensing avoids pipe deformation; multiple sets of support wheels and clamping wheels work together (adaptive ball joint structure) to ensure that the welded pipe has no radial runout during rotation; two-dimensional slide table finely adjusts the sensor position to eliminate installation errors. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is the front view of this utility model;

[0021] Figure 3 This is a top view of the present invention;

[0022] Figure 4 This is a side view of the present invention;

[0023] In the diagram: 1. Detection platform; 2. Chuck drive assembly; 3. Support assembly; 4. Clamping assembly; 5. Detection assembly; 6. Controller; 21. Three-jaw chuck; 22. Drive mechanism; 31. Support fixing seat; 32. Support wheel; 41. Wheel seat; 42. Clamping wheel; 43. Hinge bracket; 44. Lifting drive component; 51. Slide module; 52. Sensor mounting seat; 53. Displacement sensor; 511. First slide; 512. Second slide. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0025] In the attached diagram, all identical reference numerals refer to the same components.

[0026] Example 1, as Figure 1-4 As shown, this utility model provides a high-frequency welded pipe outer diameter type inspection device. The inspection platform 1 is a marble platform with dimensions of 2000×1000×150mm and a levelness error of ≤0.05mm / m.

[0027] Chuck drive assembly 2: Three-jaw chuck 21 (specification φ160mm) is fixed to the output end of drive mechanism 22 by flange; drive mechanism 22 is a 15Nm servo motor with reducer, and the base is fixed to the left side of the upper surface of detection platform 1 by bolts.

[0028] Support assembly 3 (three sets in total): The support fixing seat 31 is a welded part, bolted to the testing platform 1 at a distance of 500mm, 1000mm and 1500mm from the center of the chuck; each seat is equipped with two support wheels 32 (wheel width 40mm), the wheel surface is machined into a flat shape, and the wheel axle is embedded in a ball bearing to achieve free rotation, used to support the φ50mm welded pipe body.

[0029] Clamping assembly 4: Wheel seat 41 is a rectangular steel plate with two clamping wheels 42 installed at the bottom (structure is the same as support wheel 32); lifting drive component 44 consists of two parallel cylinders; the upper end of the hinge bracket 43 is connected to the center of wheel seat 41 through a ball joint, and the lower end is threaded to the piston rod of lifting drive component 44 (100mm stroke cylinder); the cylinder body is bolted to the upright frame above the testing platform 1.

[0030] Detection component 5: The slide module 51 is a manual two-dimensional translation slide, with the base bolted to the right side of the detection platform 1; the first slide 511 (X-axis travel 300mm) drives the second slide 512 (Y-axis travel 200mm) through a lead screw; the sensor mounting base 52 is locked onto the second slide 512, and a displacement sensor 53 (point laser type, range ±10mm, accuracy 0.005mm) is installed, with the probe aligned with the suspended section of the welded pipe between the chuck 21 and the first support component 3 (250mm from the chuck).

[0031] The controller 6 is a PLC system, which is wall-mounted on the side of the detection platform 1 and connected to the drive mechanism 22, the lifting drive component 44, and the displacement sensor 53 via cables.

[0032] The method of using this utility model is as follows:

[0033] 1. Place the φ50×2000mm high-frequency welded pipe on the support wheel 32, and clamp the pipe end with the chuck 21;

[0034] 2. The cylinder 44 drives the pressing wheel 42 to press down, so that the welded pipe is tightly against the support wheel 32;

[0035] 3. Servo motor 22 drives the welded pipe to rotate at a constant speed of 10 r / min, and point laser sensor 53 scans the cross-sectional profile;

[0036] 4. The controller 6 calculates the outer diameter and ellipticity in real time (e.g., if φ50.02mm is measured, the ellipticity is 0.12mm), and an alarm is triggered if the deviation exceeds the tolerance.

[0037] Example 2, Structural optimization points (only the differences are described): The drive mechanism 22 is upgraded to a 20Nm servo motor, and the output shaft drives the three-jaw chuck 21 through a synchronous belt transmission mechanism (no new parts added), with a transmission ratio of 3:1. Support assembly 3 (three sets in total): The surface of the support wheel 32 is improved to an arc-shaped groove (curvature R=25mm), which is suitable for pipe diameters of φ48-60mm.

[0038] Clamping assembly 4: The lifting drive component 44 is increased to two cylinders, symmetrically arranged on both sides of the hinged bracket 43, and the piston rod drives the bracket 43 to lift in parallel; the ball joint connection allows the clamping wheel 42 to adapt to the ±1° bending of the tube body.

[0039] Detection component 5: The slide module 51 is replaced with a motor-driven automatic slide; the displacement sensor 53 is replaced with a line laser sensor (scanning line length 50mm), installed at the front end of the sensor mounting base 52; the second slide 512 moves to bring the sensor 15mm away from the welded pipe surface (optimal working distance), and the first slide 511 drives the sensor to scan along the pipe axis (speed 50mm / s). The dual cylinders 44 synchronously press to eliminate off-center load, and the line laser 53 acquires the outer diameter data of the entire pipe section in one scan (e.g., it takes 30s to detect a 1500mm pipe). The controller 6 generates a 3D dimension cloud map and marks the out-of-tolerance areas.

[0040] Actual testing showed that the device exhibited significant performance improvements in both embodiments: Embodiment 1 (point laser scanning) verification results: When inspecting φ50×2000mm Q235 high-frequency welded pipes: the single-section inspection time was controlled within 60 seconds (traditional manual inspection requires 180 seconds), with an efficiency improvement of 200%; dimensional accuracy: outer diameter measurement error ≤ ±0.01mm, ellipticity detection resolution reaches 0.01mm (e.g., measured ellipticity 0.12mm); adaptability: it can stably inspect welded pipes with straightness deviation ≤0.8mm / m, and the clamping wheel adapts to slight undulations in the pipe body through the ball joint; compared with manual sampling inspection, the missed inspection rate was reduced from 15% to 0 (complete circumference scan with no blind spots).

[0041] Example 2 (Line laser scanning + double clamping) verification results

[0042] Further optimizations after configuration upgrade: Full pipe length inspection efficiency: Axial scanning of a 1500mm welded pipe can be completed in only 30 seconds (Example 1 requires measurement in 3 segments, totaling 180 seconds); Improved accuracy: Linear laser scanning covers a 50mm pipe segment in one scan, with outer diameter and ellipticity errors ≤ ±0.005mm; Strong robustness: Dual-cylinder synchronous clamping overcomes off-center load and can adapt to welded pipes with a bending degree ≤1.5mm / m; The controller generates a 3D cloud map of the outer diameter and automatically marks out-of-tolerance areas (such as detecting a local protrusion of 0.2mm).

[0043] This invention relates to a high-frequency welded pipe outer diameter inspection device. Through a coordinated design of a three-jaw chuck and multiple sets of support / pressure wheels, it achieves stable rotation of the welded pipe while it is clamped. A precisely positioned displacement sensor (laser) positioned on the side of the suspended section scans and measures the surface of the pipe during its uniform rotation. The controller then collects, analyzes, and determines the pass / fail rating of the data. This design comprehensively addresses the needs for automated, non-contact, high-precision, and high-efficiency inspection of the outer diameter of high-frequency welded pipes. It is particularly suitable for quality inspection at the end of the production line and for precise evaluation of welded pipe forming quality during R&D. Compared to traditional manual sampling or pass / fail inspection, it offers significant advantages in accuracy, efficiency, and quantitative feedback.

[0044] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-frequency welded pipe outer diameter type inspection device, characterized in that, The system includes a testing platform (1); a chuck drive assembly (2), located above the testing platform (1), comprising a three-jaw chuck (21) for clamping the end of the welded pipe and a drive mechanism (22), wherein the drive mechanism (22) is fixed on the testing platform (1) and its output end is drivenly connected to the three-jaw chuck (21); at least two support assemblies (3), fixedly installed on the testing platform (1) at intervals along the axial direction of the high-frequency welded pipe and located below the three-jaw chuck (21) for supporting the welded pipe body; and a clamping assembly (4), located on the testing platform (1) and above the support assembly (3), comprising a wheel seat (41), at least two clamping wheels (42) rotatably connected to the bottom of the wheel seat (41), a hinge bracket (43), and at least one lifting drive component (44). One end of the bracket (43) is connected to the wheel seat (41), and the other end is connected to the piston rod of the lifting drive (44); the detection component (5) is set on the detection platform (1) and located on the side of the support component (3), including a slide module (51) fixed on the detection platform (1), a sensor mounting base (52) fixedly installed on the slide module (51), and a displacement sensor (53) fixedly installed on the sensor mounting base (52). The measuring end of the displacement sensor (53) faces the suspended section of the welded pipe body that is clamped by the three-jaw chuck (21) and limited by the support component (3) and the clamping component (4); the controller (6) is fixed on the side of the detection platform (1) and is communicatively connected to the drive mechanism (22), the lifting drive (44), and the displacement sensor (53).

2. The high-frequency welded pipe outer diameter type inspection device according to claim 1, characterized in that, The support assembly (3) includes a support base (31) and at least two freely rotatable support wheels (32), the support wheels (32) being mounted on the support base (31); the wheel surface of the support wheel (32) is planar or has an arc-shaped groove adapted to the outer diameter of the welded pipe.

3. The high-frequency welded pipe outer diameter type inspection device according to claim 1, characterized in that, The clamping assembly (4) includes two vertically arranged lifting drive components (44), which are cylinders or hydraulic cylinders; the two lifting drive components (44) are configured to drive synchronously.

4. The high-frequency welded pipe outer diameter type inspection device according to claim 1, characterized in that, The displacement sensor (53) is a point laser displacement sensor or a line laser displacement sensor.

5. The high-frequency welded pipe outer diameter type inspection device according to claim 1, characterized in that, The slide module (51) is a two-dimensional translation slide, including a first slide (511) that moves in a direction parallel to the welded pipe axis and a second slide (512) that moves in a direction perpendicular to the welded pipe axis. The second slide (512) is mounted on the first slide (511), and the sensor mounting base (52) is fixedly mounted on the second slide (512). The slide module (51) is a manually operated slide or an automatic slide driven by a motor.

6. The high-frequency welded pipe outer diameter type inspection device according to claim 1, characterized in that, The drive mechanism (22) is a servo motor or a stepper motor, and a speed reduction mechanism or a synchronous belt drive mechanism is provided between its output shaft and the three-jaw chuck (21).

7. The high-frequency welded pipe outer diameter type inspection device according to claim 1, characterized in that, The hinge bracket (43) and the wheel seat (41) are connected by a ball joint or a universal joint, so that the wheel seat (41) can adapt to the undulations of the welded pipe surface, thereby driving the pressure wheel (42) to fit against the pipe body.

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