Workpiece residual stress detection device

Abstract

The invention relates to the technical field of material detection, and discloses a workpiece residual stress detection device, which comprises a frame, a detection device, a rotating structure and a control structure, the top of the frame is movably connected with a detection device, two rotating structures are arranged on the side face of the frame, the positions and movement of a tubular sample and a plate sample are limited through the rotating structures, and the rotating structures are controlled by a control structure to move. According to the invention, through the design of the through hole in the side surface of the device, the through hole has a circular part and a rectangular part, when a tubular sample is detected, the tubular sample can horizontally penetrate through the rotating cylinders which are bilaterally symmetrical, and is clamped by the rotating wheels in the rotating cylinders, so that stress at different angles can be scanned; when a plate sample is detected, the plate sample can be directly and vertically placed and fixed from the rectangular part of the through hole, and through the detection device capable of moving along the track and the positioning rotating mechanism driven by the control structure, the accurate control of the position and the focal length of a detection point is ensured.

Description

Technical Field

[0001] This invention belongs to the field of materials testing technology, and specifically relates to a device for detecting residual stress in workpieces. Background Technology

[0002] Residual stress is a self-balancing stress that forms inside a workpiece during manufacturing, processing, or service due to factors such as uneven plastic deformation, thermal stress, or phase transformation. It directly affects the workpiece's dimensional stability, fatigue life, corrosion resistance, and structural safety. In aerospace, automotive manufacturing, energy equipment, and precision instrument industries, accurate detection of residual stress in key components (such as pipes and plates) is crucial.

[0003] Currently, methods for detecting residual stress mainly include X-ray diffraction, ultrasonic testing, and magnetic measurement. However, existing testing devices are typically designed for workpieces of specific shapes (such as flat plates or regular cylinders), lacking versatility. For example, traditional testing equipment struggles to simultaneously accommodate the fixation and positioning requirements of tubular and plate samples, often requiring the replacement of specialized fixtures or adjustments to complex mechanical structures, resulting in low testing efficiency, cumbersome operation, and increased equipment costs. Furthermore, existing devices also have shortcomings in sample positioning accuracy, rotational stability, and autofocus capabilities during the testing process, affecting the accuracy and repeatability of measurement results.

[0004] Therefore, there is an urgent need to develop an integrated, multifunctional, and easy-to-operate residual stress detection device that can quickly and accurately detect residual stress in workpieces of different shapes (such as pipes and plates) without replacing core components, in order to meet the urgent needs of modern industry for efficient and accurate detection. Summary of the Invention

[0005] The purpose of this invention is to provide a workpiece residual stress detection device to solve the problem of residual stress detection for workpieces of different shapes, and to achieve efficient and accurate detection.

[0006] Based on the above concept, the technical solution adopted by this invention is as follows: A workpiece residual stress detection device is provided, comprising a frame, a detection device, a rotating structure, and a control structure; A detection device is movably connected to the top of the frame, and two rotating structures are provided on the side of the frame. The position and movement of the tubular sample and the plate sample are restricted by the rotating structures, and the movement of the rotating structures is controlled by a control structure.

[0007] In some embodiments, the frame includes a protective plate, a first track groove, a through hole, and a second track groove. Furthermore, the top protective plate has a first track groove on its inner side and a through hole on its side protective plate. The through hole has a circular part and a rectangular part. The inner side of the circular part of the through hole has a second track groove.

[0008] In some embodiments, the detection device includes a base, a stress detector, and a focal length detector.

[0009] Furthermore, the protrusion on the base is movably mounted in the first track groove, and the stress detector and the focal length detector are mounted on the bottom of the base.

[0010] In some embodiments, the rotating structure includes a rotating cylinder, a connecting rod, a rotating wheel, a spring, and a pin; the rotating cylinder in the rotating structure is arranged symmetrically from left to right.

[0011] In some embodiments, the rotating cylinder is provided with an opening, a raised track, a first fixed seat, and a second fixed seat.

[0012] Furthermore, the raised track is disposed on the outside of the rotating cylinder, and a fixed seat and a second fixed seat are provided on the inside of the rotating cylinder; the raised track, the first fixed seat and the second fixed seat are arranged in an array inside the rotating cylinder.

[0013] In some embodiments, one end of the connecting rod is connected to a first fixed seat via a pin, and the other end of the connecting rod is connected to a rotating wheel via a pin.

[0014] In some embodiments, the workpiece residual stress detection device according to claim 1, wherein the spring is connected to a second fixed base.

[0015] In some embodiments, the workpiece residual stress detection device according to claim 1 is characterized in that the control structure includes an integrated controller, a transmission rod, and a friction wheel; a set of transmission rods and friction wheels are symmetrically arranged at both ends of the integrated controller.

[0016] Furthermore, the integrated controller is mounted on a protective plate at the bottom of the frame, and the integrated controller is connected to the friction wheel via a transmission rod, the friction wheel being in contact with the rotating cylinder.

[0017] The beneficial effects of this invention are as follows: 1. This invention combines circular and rectangular sections through a through-hole design on the side of the device. When testing tubular samples, they can be passed horizontally through the symmetrical rotating cylinder and held by rotating wheels inside the cylinder to scan stress at different angles. When testing plate samples, they can be directly inserted vertically and fixed through the rectangular section of the through-hole. This integrated design eliminates the need to change any clamps or make complex mechanical adjustments, significantly improving testing efficiency and ease of operation.

[0018] 2. This invention utilizes a detection device that can move along a track and a positioning and rotating mechanism driven by a control structure. The stress detector and focal length detector can be flexibly adjusted on the base, ensuring precise control of the detection point position and focal length. Simultaneously, the integrated controller drives the rotating cylinder via a transmission rod and friction wheel, achieving precise rotation and positioning of the sample and effectively avoiding human error. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the detection device of the present invention within a frame.

[0021] Figure 3 This is a structural diagram of the detection device of the present invention.

[0022] Figure 4 This is a structural diagram of the framework of the present invention.

[0023] Figure 5 This is a schematic diagram of the rotating structure of the present invention.

[0024] Figure 6 This is a schematic diagram of the linkage connection of the present invention.

[0025] Figure 7 This is a structural diagram of the control structure of the present invention.

[0026] Figure label: Frame 1, Detection device 2, Rotating structure 3, Control structure 4, Protective plate 11, First track groove 12, Through hole 13, Circular part 131, Rectangular part 132, Second track groove 14, Base 21, Protrusion 211, Stress detector 22, Focal length detector 23, Rotating cylinder 31, Opening 311, Protruding track 312, First fixed seat 313, Second fixed seat 314, Connecting rod 32, Rotating wheel 33, Spring 34, Pin 35, Integrated controller 41, Transmission rod 42, Friction wheel 43. Detailed Implementation

[0027] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0028] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this invention pertains. The words “a” or “one” and similar terms used in this application specification and claims do not indicate a limitation of quantity, but rather indicate the presence of at least one. “A plurality” means two or more. The words “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” covers the element or object listed following “comprising” or “including” and its equivalents, and does not exclude other elements or objects. The words “connected” or “linked” and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The words “above” and / or “below” and similar terms are for ease of description only and are not limited to a location or spatial orientation. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0029] This application provides a device for detecting residual stress in a workpiece. 1. It includes a frame 1, a detection device 2, a rotating structure 3, and a control structure 4; The top of the frame 1 is movably connected to a detection device 2, and the side of the frame 1 is provided with two rotating structures 3. The position and movement of the tubular sample and the plate sample are restricted by the rotating structures 3, and the movement of the rotating structures 3 is controlled by a control structure 4.

[0030] The present invention incorporates both a circular portion 131 and a rectangular portion 132 in the through hole 13 on the side of the device. When testing tubular samples, they can be passed horizontally through the symmetrical rotating cylinder 31 and held by the rotating wheel 33 inside the rotating cylinder 31 to scan stress at different angles. When testing plate samples, they can be directly inserted vertically into and fixed through the rectangular portion 132 of the through hole 13. The invention also includes a testing device 2 that can move along the first track groove 12 and a positioning and rotation mechanism 3 driven by the control structure 4. The stress detector 22 and the focal length detector 23 can be flexibly adjusted on the base 21 to ensure precise control of the detection point position and focal length.

[0031] The following is in conjunction with the appendix Figures 1 to 7 This application provides a detailed description of a workpiece residual stress detection device.

[0032] like Figures 1 to 7As shown, the workpiece residual stress detection device provided by the present invention mainly consists of a frame 1, a detection device 2, a rotating structure 3, and a control structure 4. The core of this device lies in its ability to adaptively support and drive two different shapes of workpieces, tubular and plate-shaped, through a motion system, to complete high-precision residual stress scanning and detection.

[0033] In this embodiment, a first track groove 12 is machined on the inner side of the protective plate 11 at the top of the frame 1 to provide precise guidance for the horizontal movement of the detection device 2. A special through hole 13 is provided on the side protective plate 11, which consists of a circular portion 131 and a rectangular portion 132. This design is key to achieving "one machine, two uses": the circular portion 131 accommodates the rotating structure 3, while the rectangular portion 132 provides a direct and stable insertion channel for the plate sample. A second track groove 14 on the inner side of the circular portion 131 guides the axial movement of the rotating cylinder 31.

[0034] In this embodiment, as Figure 2 and Figure 3 As shown, the base 21 of the detection device 2 is embedded in the first track groove 12 at the top of the frame via a protrusion 211 at the bottom, allowing the entire detection device 2 to move smoothly back and forth in a linear motion along the first track groove 12. This motion can be driven by a motor to achieve automated scanning. The stress detector 22 integrated at the bottom of the base 21 is used to measure residual stress, while the focal length detector 23 can detect the distance to the workpiece surface in real time, ensuring that the stress detector 22 is always at the optimal working focal length during the scanning process.

[0035] In this embodiment, the tubular sample is horizontally inserted through the through hole 13 on one side of the device, passes through the rotating cylinder 31 on the left side, and then exits through the through hole 13 on the right side.

[0036] During the insertion of the tubular sample, the sample itself compresses the array of rotating wheels 33 inside the rotating cylinder 31. Under pressure, the rotating wheels 33 swing outward around the pin 35 on the first fixed seat 313 via the connecting rod 32, thereby stretching the spring 34 connected to the second fixed seat 314. The counterforce generated by the spring 34 is transmitted to the rotating wheels 33 through the connecting rod 32, causing them to clamp towards the center, thus adaptively and uniformly clamping the tubular sample. This clamping method effectively ensures the alignment of the tubular component and prevents eccentric wobbling during rotation.

[0037] When control structure 4 is activated, integrated controller 41 drives transmission rod 42, which in turn drives friction wheel 43 to rotate. Friction wheel 43, through friction with the outside of rotating cylinder 31, drives the entire rotating cylinder 31 to rotate around its axis. Since the rotating cylinder 31 clamps the tubular sample through the internal rotating wheel 33, the tubular sample also rotates synchronously. At this time, detection device 2 can be fixed at a certain axial position, scanning its circumferential stress by rotating the workpiece; or detection device 2 can be moved along a track while the workpiece rotates slowly, achieving a spiral scan of the tube surface.

[0038] In this embodiment, the plate is simply placed vertically into the frame through the rectangular portion 132 of the through hole 13, and the rotating cylinder 31 is started to rotate until the gap between the opening 311 and the rectangular portion 132 is equal to the thickness of the plate. Then, by controlling the detection device 2 to move linearly along the first track groove 12, the stress detection of a point on a straight line or a region on the side of the plate can be completed.

[0039] In this embodiment, as Figure 7 As shown, control structure 4 is the "heart" of the device's movement. The integrated controller 41 receives operating commands and precisely controls the motors at both ends, transmitting power to the friction wheel 43 via the transmission rod 42. By controlling the rotational speed and direction of the friction wheel 43, the rotational speed and angle of the rotating cylinder 31 and the tubular sample can be precisely controlled, thereby meeting the testing requirements of different standards.

[0040] Working principle: Tubular sample inspection: The tubular workpiece is horizontally passed through the two rotating cylinders 31. Under the action of the spring 34, the rotating wheel 33 is pushed towards the center through the connecting rod 32, thereby adaptively clamping the tubular workpiece. The integrated controller 41 drives the friction wheel 43, which in turn drives the rotating cylinder 31 and the tubular workpiece to rotate at a uniform speed. With the help of the movable detection device 2, residual stress scanning is achieved at different positions around the circumference of the tubular workpiece.

[0041] Plate sample inspection: The plate workpiece is vertically placed into the frame through the rectangular part 132 of the through hole 13 and the rotating cylinder 31 is started to rotate until the gap between the opening 311 and the rectangular part 132 is equal to the thickness of the plate; the detection device 2 is controlled to move along the first track groove 12 and the side of the plate is inspected point by point, and the focal length detector 23 ensures that the detection point is always at the optimal focal length.

[0042] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. The invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0043] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A workpiece residual stress detection apparatus characterized by comprising: It comprises a frame (1), a detection device (2), a rotating structure (3) and a control structure (4). The top of the frame (1) is movably connected with the detection device (2), and two rotating structures (3) are arranged in the through holes (13) on the sides of the frame (1); the position and movement of the tubular sample are limited by the rotating cylinder (31) of the rotating structure (3); the plate sample is placed in the rectangular part (132) of the through hole (13); and the rotating structure (3) is controlled to move by the control structure (4).

2. The apparatus according to claim 1, wherein The frame (1) comprises a protective plate (11), a first track groove (12), a through hole (13) and a second track groove (14). The inner side of the protective plate (11) on the top is provided with the first track groove (12), and the protective plate (11) on the side is provided with the through hole (13); the shape of the through hole (13) comprises a circular part (131) and a rectangular part (132); and the inner side of the circular part (131) of the through hole (13) is provided with the second track groove (14).

3. The apparatus according to claim 1, wherein The detection device (2) comprises a base (21), a stress detector (22) and a focal length detector (23). The protrusion (211) on the base (21) is movably installed in the first track groove (12), and the stress detector (22) and the focal length detector (23) are installed on the bottom of the base (21).

4. The apparatus according to claim 1, wherein The rotating structure (3) comprises a rotating cylinder (31), a connecting rod (32), a rotating wheel (33), a spring (34) and a pin shaft (35). The rotating cylinder (31) in the rotating structure (3) is arranged symmetrically left and right, and the connecting rod (32), the rotating wheel (33), the spring (34) and the pin shaft (35) are all arranged in the rotating cylinder (31).

5. The apparatus according to claim 4, wherein The rotating cylinder (31) is provided with an opening (311), a protruding track (312), a first fixed seat (313) and a second fixed seat (314). The protruding track (312) is arranged on the outer side of the rotating cylinder (31), the inner side of the rotating cylinder (31) is provided with the fixed seat (313) and the second fixed seat (314); and the protruding track (312), the first fixed seat (313) and the second fixed seat (314) are arrayed in the axial direction in the rotating cylinder (31).

6. The apparatus according to claim 4, wherein One end of the connecting rod (32) is connected with the first fixed seat (313) through the pin shaft (35), and the other end of the connecting rod (32) is connected with the rotating wheel (33) through the pin shaft (35).

7. The apparatus according to claim 4, wherein The spring (34) is connected with the second fixed seat (314).

8. The apparatus according to claim 1, wherein The control structure (4) comprises an integrated controller (41), a transmission rod (42) and a friction wheel (43); a group of transmission rods (42) and friction wheels (43) are symmetrically arranged at both ends of the integrated controller (41); The integrated controller (41) is arranged on the protective plate (11) at the bottom of the frame (1); the integrated controller (41) is connected with the friction wheel (43) through the transmission rod (42); and the friction wheel (43) is in contact with the rotating cylinder (31).

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