Metal curved surface ultrasonic flaw detection positioning adjusting device and method
By designing a positioning and adjustment device for ultrasonic detection of metal curved surfaces, automatic adjustment of probe angle is achieved using electric worms and stepper motors, the problem of difficulty in maintaining vertical probe angle in the prior art is solved, and detection efficiency and accuracy are improved.
Patent Information
- Application Number
- CN202411977559.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-05-06
AI Technical Summary
When performing ultrasonic flaw detection of metal curved surfaces, it is difficult to ensure that the angle of the probe is perpendicular to the surface to be inspected, which affects the detection accuracy, and the manual detection efficiency is low and defect information cannot be reproduced.
A metal curved surface ultrasonic flaw detection positioning adjustment device is designed, including a fixing seat, a fixing plate, an angle adjustment component, a probe fixing plate and a fixing rod. The upper and lower electric worms and stepper motors are used to automatically adjust the probe angle to ensure that the ultrasonic sound beam is parallel to the normal vector of the point to be scanned.
It improves the detection efficiency of metal curved ultrasonic C scanning, which is about twice as good as manual inspection, avoids missed inspection caused by manual operation and cannot scan the entire area, ensures that the inspection covers all workpieces, and improves the detection accuracy.
Smart Images
Figure CN119936208A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of non-destructive ultrasonic flaw detection, and in particular to a metal curved surface ultrasonic flaw detection positioning adjustment device and method. Background Art
[0002] With the development of society and the continuous progress of the manufacturing industry, curved workpieces have gradually been used in various fields such as national defense, military industry, aerospace, etc. The internal quality of curved workpieces has a great impact on their safety performance in use, so it is necessary to detect the internal defects of curved workpieces. Among the existing non-destructive testing methods, ultrasonic testing is widely used in the manufacturing industry, but currently curved workpieces are mostly tested by manual flaw detection, which is difficult to ensure the detection accuracy, cannot reproduce the defect information, and has low production efficiency. In the ultrasonic testing process, C scanning can intuitively reproduce the size and shape of the internal defects of the workpiece. It is one of the key technologies for achieving defect qualitative, positioning, quantitative and non-destructive evaluation, and has a wide range of applications in the field of non-destructive testing. During ultrasonic testing, the probe angle will affect the incidence of the sound beam and affect the detection accuracy. Conventional detection devices have limitations for ultrasonic testing of curved workpieces. It is impossible to keep the probe angle perpendicular to the surface to be tested, which affects the detection accuracy. Therefore, a metal curved surface ultrasonic flaw detection positioning adjustment device and method are needed to ensure the detection accuracy. Summary of the invention
[0003] The purpose of the present invention is to provide a metal curved surface ultrasonic flaw detection positioning adjustment device and method.
[0004] A metal curved surface ultrasonic flaw detection positioning and adjustment device comprises a fixed seat, a fixed plate, an angle adjustment component, a probe fixed plate, and a fixed rod, wherein the fixed plate is connected to one end of the fixed seat, the top end of the angle adjustment component is connected to the other end of the fixed seat, the probe fixed plate is connected to the bottom end of the angle adjustment component, the fixed seat is vertically connected to the fixed rod, and the angle adjustment component comprises an upper base, an upper slide, an upper electric worm, a lower base, a lower slide, and a lower electric worm, wherein the upper base is connected to the upper slide, the lower base is connected to the lower slide, the upper base is fixed on the lower slide, the upper electric worm is limitedly connected to the upper base, the lower electric worm is limitedly connected to the lower base, and the rotation axis of the upper electric worm is perpendicular to that of the lower electric worm.
[0005] Furthermore, the fixing plate fixes the underwater laser three-dimensional scanner, and the probe fixing plate fixes the ultrasonic probe.
[0006] Furthermore, the upper electric worm gear and the lower electric worm gear are both provided with external threads, and one end thereof is connected to the stepping motor, the upper base and the lower base are both provided with round holes and through holes, and the upper slide and the lower slide are both provided with internal threads; the upper electric worm gear and the lower electric worm gear pass through the round holes and through holes respectively, so that the external threads are in contact with the internal threads, thereby realizing a limited connection with the upper base and the lower base.
[0007] Furthermore, a clamping block is provided at the connection between the upper base and the upper slide, and at the connection between the lower base and the lower slide. Knobs are provided on the upper slide and the lower slide. The knobs are turned to squeeze the clamping blocks, so that the upper base and the upper slide, and the lower base and the lower slide are limitedly connected to prevent the upper base and the upper slide, and the lower base and the lower slide from falling off.
[0008] Furthermore, small holes are arranged on the four corners of the lower slide, and the upper base and the lower slide are fixedly connected through the small holes.
[0009] Furthermore, the angle adjustment component is made of stainless steel.
[0010] A method for adjusting a positioning and adjusting device for ultrasonic flaw detection on a metal curved surface. When a motion control module sends instructions to an upper electric worm and a lower electric worm, a stepper motor starts to work, drives an outer thread to rotate, and the outer thread drives an inner thread to move, thereby changing the relative positions of an upper base and an upper slide table, and a lower base and a lower slide table, achieving a maximum angle variation range of ±25°, ensuring that the direction of an ultrasonic sound beam emitted by an ultrasonic probe is parallel to the normal vector of a point to be scanned, and completing the adjustment of the positioning and adjusting device for ultrasonic flaw detection on a metal curved surface.
[0011] The beneficial effects of the present invention are:
[0012] The present invention can realize ultrasonic C scanning of metal curved surfaces, which improves the detection efficiency by about two times compared with manual detection, and avoids missed detection due to the inability to scan the entire area by manual operation, ensuring that the detection can cover the entire workpiece. In addition, the generated detection results are more convenient for technicians to make judgments, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the application of the positioning and adjusting device for ultrasonic flaw detection of curved metal surfaces of the present invention;
[0014] Figure 2 It is a structural schematic diagram of the positioning and adjusting device for ultrasonic flaw detection of curved metal surfaces of the present invention;
[0015] Figure 3 It is a cross-sectional view of the positioning and adjusting device for ultrasonic flaw detection of metal curved surfaces in the X direction;
[0016] Figure 4 is a schematic diagram of the base structure;
[0017] Figure 5 It is a schematic diagram of the slide structure;
[0018] Figure 6 It is a schematic diagram of the electric worm structure;
[0019] Figure 7 It is a structural schematic diagram of a combination of a base and a slide;
[0020] Figure 8 This is a diagram of the scanned surface model after the implementation of the present invention. DETAILED DESCRIPTION
[0021] The present invention provides a metal curved surface ultrasonic flaw detection positioning adjustment device and method, which will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0022] Figure 1 , Figure 2 They are respectively an application schematic diagram and a structural schematic diagram of the metal curved surface ultrasonic flaw detection positioning and adjustment device of the present invention; Figure 3 This is a cross-sectional view of the X-direction positioning and adjustment device for ultrasonic flaw detection of metal curved surfaces. Figure 1 , Figure 2 and Figure 3 The metal curved surface ultrasonic flaw detection positioning and adjustment device includes a fixed seat 1, a fixed plate 2, an angle adjustment component 3, a probe fixed plate 4, and a fixed rod 5. The fixed plate 2 is connected to one end of the fixed seat 1, the top of the angle adjustment component 3 is connected to the other end of the fixed seat 1, the probe fixed plate 4 is connected to the bottom end of the angle adjustment component 3, the fixed seat 1 is vertically connected to the fixed rod 5, and the angle adjustment component 3 includes an upper base 31, an upper slide 32, an upper electric worm 33, a lower base 34, a lower slide 35, and a lower electric worm 36, wherein the upper base 31 is connected to the upper slide 32, the lower base 34 is connected to the lower slide 35, the upper base 31 is fixed on the lower slide 35, the upper electric worm 33 is limitedly connected to the upper base 31, the lower electric worm 36 is limitedly connected to the lower base 34, and the rotation axis of the upper electric worm 33 is perpendicular to that of the lower electric worm 36.
[0023] In the overall application of the metal curved surface ultrasonic flaw detection positioning and adjustment device, the underwater laser three-dimensional scanner is installed on the fixed plate 2. In the process of detecting the metal curved surface workpiece, the metal curved surface workpiece is placed in water, and the bubbles on the surface of the workpiece are wiped off. The motion control module in the computer 100 issues instructions to control the motor to work, and the underwater laser three-dimensional scanner is moved above the workpiece to be inspected. Then the underwater laser three-dimensional scanner starts to work, obtains the three-dimensional coordinates of the workpiece to be inspected and generates a point cloud file. The point cloud file is used to generate a Gaussian fitting curve, and then a CAD model of the workpiece to be inspected is generated, and the CAD model is output to the computer 100; the scanning path calculation module automatically plans the scanning path and the probe angle adjustment information of the curved surface according to the CAD model, and outputs the signal to the motion control module. The motor is connected to the adjustment device 300 through the equipment truss 200. The motion control module controls the motor to drive the adjustment device 300 to move according to the set scanning step and spacing. The motion control module controls the upper electric worm 33 and the lower electric worm 36 on the angle adjustment component 3 to work.
[0024] Figure 4 , Figure 5 , Figure 6 They are the structural schematic diagrams of the base, slide, and electric worm respectively; Figure 7 This is a schematic diagram of the structure of a base and a slide combination. Figure 4 , Figure 5 , Figure 6 and Figure 7 , the internal connection mode and adjustment method of the metal curved surface ultrasonic flaw detection positioning adjustment device are as follows: a stepper motor 332 and an external thread 331 are provided on the upper electric worm 33, the stepper motor 332 is fixedly connected to the external thread 331, the upper electric worm 33 passes through the circular hole 311 and the through hole 312 in sequence, so that the external thread 331 contacts the internal thread 321 on the upper slide 32, when the motion control module sends a command to the upper electric worm 33, the stepper motor 332 starts to work, drives the external thread 331 to start rotating, and the external thread 331 drives the internal thread 321 to move, and the upper slide 32 is connected to the internal thread, and the upper electric worm 33 is limitedly connected to the upper base 31, so when the stepper motor 332 works, it will change the relative position of the upper base 31 and the upper slide 32, and the lower electric worm 36 can change the relative position of the lower base 34 and the lower The relative position of the slide 35, the upper base 31 and the lower slide 35 are fixedly connected through the small hole 343, when the upper base 31 contacts the upper slide 32, a squeezing block 341 is placed inside, the knob 342 is limitedly connected to the upper slide 32, and the knob 342 is turned to squeeze the squeezing block 341, so that the upper base 31 and the upper slide 32 are limitedly connected, and the lower base 34 and the lower slide 35 are connected in accordance with the connection principle of the upper base 31 and the upper slide 32. On the above basis, after the upper electric worm 33 and the lower electric worm 36 receive the instruction issued by the motion control module, the motion control module controls the upper electric worm 33 and the lower electric worm 36 to rotate a certain angle respectively, so as to ensure that the direction of the ultrasonic sound beam emitted by the probe is parallel to the normal vector of the point to be scanned, and finally the internal quality of the curved metal is detected through the continuous operation of the motor and the stepper motor.
[0025] Figure 8 This is a model diagram of the scanned surface after the implementation of the present invention. The present invention can realize ultrasonic C scanning of metal surfaces, which improves the detection efficiency by about two times compared with manual detection, and avoids missed detection due to the inability to scan the entire area by manual operation, ensuring that the detection can cover the entire workpiece. In addition, the generated detection results are more convenient for technicians to make judgments, thereby improving the detection accuracy.
Claims
1. A metal curved surface ultrasonic flaw detection positioning and adjustment device, comprising a fixing seat (1), a fixing plate (2), an angle adjustment component (3), a probe fixing plate (4), and a fixing rod (5), wherein the fixing plate (2) is connected to one end of the fixing seat (1), the top end of the angle adjustment component (3) is connected to the other end of the fixing seat (1), the probe fixing plate (4) is connected to the bottom end of the angle adjustment component (3), and the fixing seat (1) is vertically connected to the fixing rod (5), characterized in that: The angle adjustment assembly (3) comprises an upper base (31), an upper slide (32), an upper electric worm (33), a lower base (34), a lower slide (35), and a lower electric worm (36), wherein the upper base (31) is connected to the upper slide (32), the lower base (34) is connected to the lower slide (35), the upper base (31) is fixed on the lower slide (35), the upper electric worm (33) is limitedly connected to the upper base (31), the lower electric worm (36) is limitedly connected to the lower base (34), and the rotation axes of the upper electric worm (33) and the lower electric worm (36) are perpendicular.
2. The metal curved surface ultrasonic flaw detection positioning and adjustment device according to claim 1 is characterized in that: The fixing plate (2) fixes the underwater laser three-dimensional scanner, and the probe fixing plate (4) fixes the ultrasonic probe.
3. The metal curved surface ultrasonic flaw detection positioning and adjustment device according to claim 1 is characterized in that: The upper electric worm (33) and the lower electric worm (36) are both provided with external threads (331), and one end of each is connected to a stepping motor (332); the upper base (31) and the lower base (34) are both provided with round holes (311) and through holes (312); the upper slide (32) and the lower slide (35) are both provided with internal threads (321); the upper electric worm (33) and the lower electric worm (36) respectively pass through the round holes (311) and the through holes (312) in sequence, so that the external threads (331) and the internal threads (321) are in contact with each other, thereby realizing a position-limiting connection with the upper base (31) and the lower base (34).
4. The metal curved surface ultrasonic flaw detection positioning and adjustment device according to claim 3 is characterized in that: A clamping block (341) is provided at the connection between the upper base (31) and the upper slide (32), and at the connection between the lower base (34) and the lower slide (35). A knob (342) is provided on the upper slide (32) and the lower slide (35). The knob (342) is turned to squeeze the clamping block (341), so that the upper base (31) and the upper slide (32), and the lower base (34) and the lower slide (35) are limitedly connected, thereby preventing the upper base (31) and the upper slide (32), and the lower base (34) and the lower slide (35) from falling off.
5. The metal curved surface ultrasonic flaw detection positioning and adjustment device according to claim 4 is characterized in that: Small holes (343) are arranged on the four corners of the lower slide platform (35), and the upper base (31) and the lower slide platform (35) are fixedly connected through the small holes (343).
6. The metal curved surface ultrasonic flaw detection positioning and adjustment device according to claim 1, characterized in that: The angle adjustment component (3) is made of stainless steel.
7. A method for adjusting the positioning and adjusting device for ultrasonic flaw detection of metal curved surfaces according to claim 4, characterized in that: When the motion control module sends instructions to the upper electric worm (33) and the lower electric worm (36), the stepper motor (332) starts to work, driving the external thread (331) to rotate, and the external thread (331) drives the internal thread (321) to move, changing the relative positions of the upper base (31) and the upper slide (32) and the lower base (34) and the lower slide (35), achieving a maximum angle change range of ±25°, ensuring that the direction of the ultrasonic sound beam emitted by the probe is parallel to the normal vector of the point to be scanned, and completing the adjustment of the metal curved surface ultrasonic flaw detection positioning adjustment device.