Automatic detection device for residual stress of ferromagnetic metal

Abstract

The utility model discloses an automatic detection device for ferromagnetic metal residual stress. The automatic detection device comprises a bottom plate, a sliding frame, a moving unit, a magnetic coercive force stress test probe and an adsorption unit, the bottom plate is provided with a detection groove used for stretching across a weld joint. The sliding frame is arranged above the detection groove; the moving unit is arranged on the bottom plate, the moving unit is in transmission connection with the sliding frame, and the moving unit is used for driving the sliding frame to move along the detection groove; the magnetic coercive force stress test probe is connected with the sliding frame; the adsorption unit is arranged on the bottom plate and is used for adsorbing the bottom plate on a detection surface; and the magnetic coercive force stress test probe is used for detecting the welding seam. According to the utility model, multiple data points can be measured along a straight line, the probe needs to be kept to move linearly along one direction in the test process, and the acquisition efficiency of testing multiple data points is high.

Description

Technical Field

[0001] This utility model relates to the field of magnetic coercivity residual stress testing, and in particular to an automatic detection device for residual stress in ferromagnetic metals. Background Technology

[0002] Magnetic coercivity residual stress testing is a method for measuring residual stress based on the mechanomagnetic coupling effect of ferromagnetic materials. When ferromagnetic materials are subjected to stress, their microscopic magnetic domain structure and permeability change, thus affecting the value of coercivity. By measuring the coercivity, the magnitude of residual stress within the ferromagnetic material can be characterized.

[0003] Existing technologies typically require placing the probe flat on the workpiece surface when testing residual stress using coercivity. Then, the test button is pressed, and multiple data points are measured along a straight line. Finally, a stress distribution diagram is drawn based on the data points. During the test, the probe needs to be moved in a straight line in one direction to test multiple data points. In actual operation, it is difficult to keep the probe in a straight line, and there are many data points to collect, resulting in low efficiency.

[0004] Therefore, an automatic detection device for residual stress in ferromagnetic metals is needed to solve the above problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] An automatic detection device for residual stress in ferromagnetic metals includes a base plate, a sliding frame, a moving unit, a magnetic coercivity stress test probe, and an adsorption unit.

[0007] The base plate is provided with a detection groove for crossing the weld; a sliding frame is set above the detection groove; a moving unit is set on the base plate, and the moving unit is connected to the sliding frame in a transmission manner. The moving unit is used to drive the sliding frame to move along the detection groove; a magnetic coercive stress test probe is connected to the sliding frame; an adsorption unit is set on the base plate, and the adsorption unit is used to adsorb the base plate onto the detection surface; the magnetic coercive stress test probe is used to detect the weld.

[0008] Preferably, the moving unit includes a slide bar, a lead screw, a slider, and a stepper motor; the slider is fixedly connected to the sliding frame;

[0009] The lead screw is rotatably mounted on the base plate, with both ends of the lead screw also mounted on the base plate; both the slide rod and the lead screw perpendicularly pass through the slider; the slide rod is slidably connected to the slider, and the lead screw is threadedly connected to the slider; the stepper motor is fixedly mounted on the base plate, and the output end of the stepper motor is connected to the lead screw drive.

[0010] Preferably, the adsorption unit includes several magnetic absorbing sheets and several magnetic absorbing grooves; the several magnetic absorbing grooves are disposed on the base plate and are horizontally distributed along one side of the detection groove; each magnetic absorbing sheet is disposed in a magnetic absorbing groove.

[0011] Preferably, the magnetic attractant is an electromagnet.

[0012] Preferably, an encoder is installed on the sliding frame, and the output end of the encoder is connected to the roller drive, with the surface of the roller in contact with the base plate.

[0013] Preferably, each magnetic clip is snapped into a magnetic groove.

[0014] Preferably, the base plate is provided with a scale, which is set along one side of the detection groove.

[0015] Preferably, the magnetic coercivity stress test probe is screwed to the sliding frame.

[0016] Preferably, the sliding frame has two auxiliary structures symmetrically arranged; each auxiliary structure includes a wheel frame, a roller, and an L-shaped plate; the roller is rotatably mounted on the wheel frame; one end of the L-shaped plate is screwed to the sliding frame; a bolt is provided on one end of the wheel frame, and the bolt is slidably connected to one end of the L-shaped plate; a locking nut is provided on one end of the L-shaped plate and screwed to the bolt; at least one rod is provided on one end of the wheel frame; one end of the rod passes through the L-shaped plate and is slidably connected to the L-shaped plate; a spring is sleeved on the rod, and the spring is located between the L-shaped plate and the wheel frame; the roller is located in the detection groove.

[0017] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0018] This invention can measure multiple data points along a straight line. During the test, the probe needs to be moved in a straight line in one direction, which improves the efficiency of collecting multiple data points.

[0019] Secondly, the current detection position can be clearly defined through the scale and encoder, which facilitates the processing of detection data by the user. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the automatic detection device for residual stress in ferromagnetic metals according to this utility model;

[0022] Figure 2 This is another structural schematic diagram of the automatic detection device for residual stress in ferromagnetic metals according to this utility model.

[0023] Explanation of key component symbols:

[0024]

[0025] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present invention. The terms "first," "second," etc., in the specification, claims, and accompanying drawings of the present invention are used to distinguish different objects and not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to imply non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] Please see Figure 1-2 This utility model provides an automatic detection device for residual stress in ferromagnetic metals, including a base plate 1, a sliding frame 2, a moving unit 3, a magnetic coercivity stress test probe 4, and an adsorption unit 5.

[0029] The base plate 1 is provided with a detection groove 11 for crossing the weld; the sliding frame 2 is provided above the detection groove 11; the moving unit 3 is provided on the base plate 1, and the moving unit 3 is connected to the sliding frame 2 in a transmission manner. The moving unit 3 is used to drive the sliding frame 2 to move along the detection groove 11; the magnetic coercive stress test probe 4 is connected to the sliding frame 2; the adsorption unit 5 is provided on the base plate 1, and the adsorption unit 5 is used to adsorb the base plate 1 onto the detection surface.

[0030] In one embodiment of this utility model, the moving unit 3 includes a slide bar 31, a lead screw 32, a slider 33, and a stepper motor 34; the slider 33 is fixedly connected to the sliding frame 2;

[0031] The lead screw 32 is rotatably mounted on the base plate 1, with both ends of the lead screw 32 also mounted on the base plate 1. Both the slide rod 31 and the lead screw 32 perpendicularly pass through the slider 33. The slide rod 31 is slidably connected to the slider, and the lead screw 32 is threadedly connected to the slider. The stepper motor 34 is fixedly mounted on the base plate 1, and its output end is connected to the lead screw 32 for transmission. The stepper motor 34 drives the lead screw 32 to rotate, thereby causing the sliding frame 2 to move along the detection groove 11.

[0032] In one embodiment of the present invention, the adsorption unit 5 comprises a plurality of magnetic absorbing sheets 51 and a plurality of magnetic absorbing grooves 52; the plurality of magnetic absorbing grooves are disposed on the base plate 1 and are horizontally distributed along one side of the detection groove 11; each magnetic absorbing sheet is disposed in a magnetic absorbing groove.

[0033] In one embodiment of this utility model, the magnetic absorbing piece 51 is an electromagnet piece; when the magnetic absorbing piece 51 is energized, the base plate 1 is attracted to the surface of the iron detection unit.

[0034] In one embodiment of this utility model, an encoder 20 is provided on the sliding frame 2. The output end of the encoder 20 is connected to the rolling wheel 201. The surface of the rolling wheel is in contact with the base plate 1. The rolling wheel rolls as the sliding frame 2 moves, and the encoder 20 records the current position of the magnetic coercivity stress test probe 4.

[0035] In one embodiment of this utility model, each magnetic clasp is snapped into a magnetic groove.

[0036] In one embodiment of this utility model, a scale 10 is provided on the base plate 1, and the scale 10 is arranged along one side of the detection groove 11. The scale is used to check the current relative position of the magnetic coercivity stress test probe 4.

[0037] In one embodiment of this utility model, the magnetic coercivity stress test probe 4 is screwed to the sliding frame 2.

[0038] In one embodiment of this utility model, two auxiliary structures 5 are symmetrically arranged on the sliding frame 2; each auxiliary structure 5 includes a wheel frame 51, a roller 52, and an L-shaped plate 53; the roller 52 is rotatably mounted on the wheel frame 51; one end of the L-shaped plate 53 is screwed to the sliding frame 2; a bolt 551 is provided on one end of the wheel frame 51, and the bolt 551 is slidably connected to one end of the L-shaped plate 53; a locking nut is provided on one end of the L-shaped plate 53 and screwed to the bolt 551; at least one rod 552 is provided on one end of the wheel frame 51; one end of the rod 552 passes through the L-shaped plate 53 and is slidably connected to the L-shaped plate 53; a spring 553 is sleeved on the rod 552, and the spring 553 is located between the L-shaped plate 53 and the wheel frame 51; the roller 52 is located in the detection groove 11.

[0039] When the sliding frame 2 moves, the roller 52 moves within the detection groove 11. When the roller passes over the raised weld, the rod 552 slides relative to the L-shaped plate 53, and the spring 553 is compressed. After the roller passes the weld, the spring recovers, and the roller 52 continues to adhere to the surface of the object being tested. This increases the stability of the magnetic coercivity stress test probe 4 during movement.

[0040] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An automatic detection device for residual stress in ferromagnetic metals, characterized in that: Includes base plate, sliding frame, moving unit, magnetic coercivity stress test probe and adsorption unit; The base plate is provided with a detection groove for crossing the weld; a sliding frame is set above the detection groove; a moving unit is set on the base plate, and the moving unit is connected to the sliding frame in a transmission manner. The moving unit is used to drive the sliding frame to move along the detection groove; a magnetic coercive stress test probe is connected to the sliding frame; an adsorption unit is set on the base plate, and the adsorption unit is used to adsorb the base plate onto the detection surface; the magnetic coercive stress test probe is used to detect the weld.

2. The automatic detection device for residual stress in ferromagnetic metals according to claim 1, characterized in that: The moving unit includes a slide bar, a lead screw, a slider, and a stepper motor; the slider is fixedly connected to the sliding frame. The lead screw is rotatably mounted on the base plate, with both ends of the lead screw also mounted on the base plate; both the slide rod and the lead screw pass vertically through the slider; the slide rod is slidably connected to the slider, and the lead screw is threadedly connected to the slider; the stepper motor is fixedly mounted on the base plate, and the output end of the stepper motor is connected to the lead screw drive.

3. The automatic detection device for residual stress in ferromagnetic metals as described in claim 1, characterized in that: The adsorption unit includes several magnetic plates and several magnetic grooves; the magnetic grooves are arranged on the base plate and are horizontally distributed along one side of the detection groove; each magnetic plate is arranged in a magnetic groove.

4. The automatic detection device for residual stress in ferromagnetic metals as described in claim 1, characterized in that: An encoder is installed on the sliding frame. The output end of the encoder is connected to the roller drive, and the surface of the roller contacts the base plate.

5. The automatic detection device for residual stress in ferromagnetic metals as described in claim 1, characterized in that: Two auxiliary structures are symmetrically arranged on the sliding frame; each auxiliary structure includes a wheel frame, rollers, and an L-shaped plate; the rollers are rotatably mounted on the wheel frame; one end of the L-shaped plate is screwed to the sliding frame; a bolt is provided on one end of the wheel frame, and the bolt is slidably connected to one end of the L-shaped plate; a locking nut is provided on one end of the L-shaped plate and screwed to the bolt; at least one rod is provided on one end of the wheel frame; one end of the rod passes through the L-shaped plate and is slidably connected to the L-shaped plate; a spring is sleeved on the rod, and the spring is located between the L-shaped plate and the wheel frame; the rollers are located in the detection groove.

6. The automatic detection device for residual stress in ferromagnetic metals as described in claim 1, characterized in that: The base plate is equipped with graduations, which are set along one side of the detection groove.

7. The automatic detection device for residual stress in ferromagnetic metals as described in claim 3, characterized in that: The magnetic attractor is an electromagnet.

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