A fillet weld leg size measuring device and method

Abstract

This invention discloses a device and method for measuring the weld leg size of a fillet weld. The device includes a measuring device body; the measuring device body includes a contact plane for contacting the base material surface and a retractable scale; the measuring device body is provided with a detection mechanism for detecting whether the contact plane is in contact with the base material surface; a weld contact portion is provided at the end of the contact plane; when the contact plane is in contact with the base material surface, the measuring device body moves towards a vertical plate that is fillet welded to the base material under the action of an external force, and the vertical plate pushes the scale to slide; when the weld contact portion contacts the fillet weld, and the detection mechanism detects that the contact plane is separated from the base material surface, the fillet weld size is read by the scale; this invention uses electrical contacts to precisely control the measurement stop position, ensuring the consistency of repeated weld leg size measurement results, thereby reducing the difficulty of operation and improving the detection efficiency.

Description

Technical Field

[0001] This invention belongs to the field of weld size measurement technology, specifically relating to a device and control method for measuring the weld leg size of fillet welds. Background Technology

[0002] Fillet welds, as one of the most common connection forms in welded structures, are widely used in the field of engineering machinery. Among the many indicators for evaluating the quality of fillet welds, the weld leg size is the most fundamental and core geometric parameter. It not only directly reflects the cross-sectional size and load-bearing capacity of the weld, but also serves as the basis for calculating the weld throat thickness. Therefore, the measurement of fillet weld leg size is crucial in daily inspections in manufacturing workshops, assessments of welder skill levels, and in welding process development and experimental research.

[0003] However, due to limitations in existing measuring tools and techniques, obtaining high-precision weld toe dimensions in field environments remains challenging. While the most commonly used HJC series fillet weld inspection rulers can provide relatively accurate readings, their operation relies heavily on the operator's hands. It's important to note that many field inspectors primarily use a method of "pushing the tool along the plate surface to the weld toe until it can't be pushed any further." This method, relying on personal feel and force habits to determine the measurement endpoint, can produce significant measurement differences between different operators. Operators with greater strength may over-press the tool into the smooth transition zone of the weld toe, while operators with less strength may stop pushing before reaching the actual weld toe position. When the inspection result is near the acceptable boundary, this measurement error caused by human factors can easily lead to quality disputes.

[0004] Therefore, developing a device and method for measuring the weld leg size of fillet welds that can quickly, accurately, and stably reproduce measurement results in a field environment is of great practical significance for ensuring the safety of welded structures and improving inspection efficiency. Summary of the Invention

[0005] This invention provides a device and method for measuring the weld leg size of fillet welds, eliminating measurement errors caused by differences in the force and feel of operators in existing measurement methods. It uses electrical contacts to precisely control the measurement stop position, ensuring the consistency of repeated weld leg size measurement results, thereby reducing the difficulty of operation and improving the inspection efficiency.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] The first aspect of the present invention provides a fillet weld leg size measuring device, including a measuring device body; the measuring device body includes a contact plane for conforming to the surface of the base material and a retractable scale.

[0008] The measuring device body is equipped with a detection mechanism capable of detecting whether the contact plane is in contact with the surface of the base material; the end of the contact plane is provided with a weld contact portion;

[0009] The contact plane is in contact with the surface of the base material. Under the action of external force, the measuring device body moves towards the upright plate that is corner welded to the base material. The upright plate pushes the scale to slide. When the weld contact part contacts the fillet weld, the detection mechanism detects that the contact plane is separated from the surface of the base material, and the size of the fillet weld is read by the scale.

[0010] Furthermore, the detection mechanism includes several conductive terminals, which are spaced apart on the contact plane of the measuring device body; the conductive terminals are electrically connected to the controller; when the contact plane is in contact with the surface of the base material, the controller, conductive terminals and base material form a contact control circuit; when the contact plane is separated from the surface of the base material, the contact control circuit is disconnected.

[0011] Furthermore, an insulating threaded sleeve is provided between the measuring device body and the conductive terminals. The depth to which the conductive terminals are screwed into the insulating threaded sleeve can be adjusted to keep the contact planes of each conductive terminal and the measuring device body on the same plane.

[0012] Furthermore, the measuring device body is provided with a slide rail; the scale is slidably connected to the measuring device body along the slide rail; the measuring device body is provided with a pointer or edge for assisting in reading the scale.

[0013] Furthermore, the weld contact portion is provided with a contact block, which has an un-chamfered corner for measuring fillet welds, and the contact block is detachably connected to the measuring device body.

[0014] Furthermore, the unbeveled edge is 90 degrees.

[0015] Furthermore, a magnet is provided on the contact plane of the measuring device body, and the magnet attracts the base material to assist the measuring device body and the base material in automatic bonding.

[0016] Furthermore, the measuring device body is provided with a handheld component for pushing the measuring device body and a testing mechanism for determining whether the thrust is greater than the set thrust threshold; when the thrust is greater than the set thrust threshold, the fillet weld size is read by a scale.

[0017] Furthermore, the handheld component is a push rod, and the measuring device body is provided with several sliding rods. The push rod is provided with a through hole that cooperates with the sliding rod, and the push rod is slidably connected to the sliding rod through the through hole; a spring is provided between the push rod and the measuring device body.

[0018] Furthermore, the inspection mechanism is a pressure sensor, which has a connection between a spring and the measuring device body or a spring and a push rod. The pressure sensor is electrically connected to the controller, and the controller determines whether the thrust on the measuring device body is greater than a set thrust threshold based on the pressure information detected by the pressure sensor.

[0019] Furthermore, the inspection mechanism comprises a first contact conductor and a second contact conductor; the first contact conductor and the second contact conductor are respectively disposed on the measuring device body and the push rod, and the positions of the first contact conductor and the second contact conductor correspond to each other; the first contact conductor and the second contact conductor are electrically connected to the controller;

[0020] When the thrust exceeds the set thrust threshold, the first contact conductor and the second contact conductor come together to form a closed loop.

[0021] Furthermore, the measuring device body and the push rod are provided with insulating threaded sleeves. The first contact conductor and the second contact conductor are screwed into the corresponding insulating threaded sleeves. The screwing depth of the first contact conductor and the second contact conductor can be adjusted to change the set thrust threshold.

[0022] Furthermore, the measuring device body is provided with an electric locking mechanism for limiting the sliding of the scale, and the electric locking mechanism is electrically connected to the controller; the initial state of the electric locking mechanism is to lock the scale.

[0023] When the testing agency detects the contact plane's fit with the base material surface, the controller activates the electric locking mechanism to release the scale.

[0024] When the testing agency detects that the contact plane separates from the surface of the base material, or when the thrust on the measuring device body exceeds the set thrust threshold, the controller restores the electric locking mechanism to its initial state.

[0025] Furthermore, the measuring device body includes a first end connection part, a second end connection part, and an intermediate connection part; the first end connection part, the intermediate connection part, and the second end connection part are connected in sequence to form a C-shape; the scale is disposed in the first end connection part, the handheld component and the inspection mechanism are disposed in the intermediate connection part; the weld contact part, the contact plane and the detection mechanism are disposed in the second end connection part.

[0026] Furthermore, the measuring device body is provided with a prompting mechanism, and the controller is electrically connected to the prompting mechanism. When the detection mechanism detects that the contact plane is separated from the surface of the base material, or when the thrust on the measuring device body is greater than the set thrust threshold, the prompting mechanism issues a prompting signal.

[0027] Furthermore, the notification mechanism is a notification light or a speaker.

[0028] Furthermore, the start button and the stop button are installed on the measuring device body, and are used to control the power supply of the device to be turned on and off, respectively.

[0029] A second aspect of the present invention provides a method of using a fillet weld leg size measuring device, comprising:

[0030] The contact plane is in contact with the surface of the base material, and the measuring device body moves towards the vertical plate that is corner-welded to the base material under the action of external force, and the vertical plate pushes the scale to slide.

[0031] When the weld contact portion comes into contact with the fillet weld, and the inspection mechanism detects that the contact plane is separated from the base material surface, the fillet weld size is read by a scale.

[0032] Furthermore, the measuring device body is provided with a handheld component for pushing the measuring device body and a testing mechanism for determining whether the thrust is greater than the set thrust threshold; when the thrust is greater than the set thrust threshold, the fillet weld size is read by a scale.

[0033] Furthermore, the measuring device body is provided with an electric locking mechanism for limiting the sliding of the scale, and the electric locking mechanism, the inspection mechanism, and the detection mechanism are electrically connected to the controller; the initial state of the electric locking mechanism is to lock the scale.

[0034] When the testing agency detects the contact plane's fit with the base material surface, the controller activates the electric locking mechanism to release the scale.

[0035] When the testing agency detects that the contact plane separates from the surface of the base material, or when the thrust on the measuring device body exceeds the set thrust threshold, the controller restores the electric locking mechanism to its initial state.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] The measuring device body of the present invention is provided with a detection mechanism that can detect whether the contact plane is in contact with the surface of the base material; when the contact plane is in contact with the surface of the base material, the measuring device body moves towards the upright plate that is corner-welded to the base material under the action of external force, and the upright plate pushes the scale to slide; the detection mechanism can ensure that the measurement operation can only be performed when the device is fully in contact with the surface of the base material, effectively preventing the result deviation caused by the device tilting or tilting, and further ensuring the measurement accuracy.

[0038] When the weld contact part contacts the fillet weld, and the detection mechanism detects that the contact plane is separated from the base material surface, the fillet weld size is read by a scale. The detection mechanism replaces the existing measurement method that relies on the operator's sense of touch to judge "until it can't be pushed anymore". It fundamentally eliminates the measurement error caused by the difference in the force and sense of touch of the operator, and significantly improves the measurement accuracy and consistency of the results. Attached Figure Description

[0039] Figure 1 This is a structural diagram of the fillet weld leg size measuring device provided in Embodiment 1 of the present invention;

[0040] Figure 2 This is an isometric view of the fillet weld leg size measuring device provided in Embodiment 1 of the present invention;

[0041] Figure 3 This is a diagram showing the usage status of the fillet weld leg size measuring device provided in Embodiment 1 of the present invention.

[0042] In the figure, 1 is the measuring device body, 2 is the scale, 3 is the electric locking mechanism, 4 is the slide, 5 is the spring, 6 is the slide rod, 7 is the push rod, 8 is the first contact conductor, 9 is the second contact conductor, 10 is the contact block, 11 is the conductive terminal, 12 is the magnet; 13 is the start button, 14 is the stop button, 15 is the contact surface, 16 is the base material, 17 is the upright plate, and 18 is the fillet weld. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0044] Example 1

[0045] like Figures 1 to 3 As shown, this embodiment provides a fillet weld leg size measuring device, including a measuring device body 1; the measuring device body 1 includes a first end connecting part, a second end connecting part and an intermediate connecting part; the first end connecting part, the intermediate connecting part and the second end connecting part are connected in sequence to form a C-shape.

[0046] It should be noted that the first and second end connecting parts extend to one side to provide an installation position for the scale and the detection mechanism. The space in the middle of the C-shaped measuring device body can not only reduce the weight and volume of the measuring device and improve the overall portability, but also avoid interference with the welding material as much as possible during the measurement process.

[0047] The measuring device body 1 has a slide rail 4 at its first end connection; the scale 2 is slidably connected to the measuring device body 1 along the slide rail 4; the measuring device body 1 has a pointer or edge for assisting in reading the scale.

[0048] It should be noted that in this embodiment, the slide 4 is a rectangular through hole, which is set along the extension direction of the first end connection part; the scale 2 is inserted into the rectangular through hole, and the scale can slide freely to realize the telescopic function of the scale; in this embodiment, the telescopic scale can also be a scale with two sections of sleeve telescopic, or a scale that slides along the slide groove.

[0049] The scale 2 is matched to the size of the rectangular through hole, ensuring that the scale fits well against the inner wall of the rectangular through hole without wobbling. This prevents the scale from slipping directly when the measuring device is tilted, and also ensures that the user can accurately read the scale using the pointer or the edge. In this embodiment, the scale is read using the edge of the rectangular through hole.

[0050] The lower surface of the first end connecting part of the measuring device body 1 is set as the contact surface 15. In this embodiment, the sliding direction of the contact surface 15 and the scale 2 are parallel to each other. The contact surface 15 is provided with a detection mechanism that can detect whether the contact plane is in contact with the surface of the base material.

[0051] The testing mechanism includes a plurality of conductive terminals 11, which are spaced apart on the contact plane 15 of the measuring device body. The conductive terminals 11 are electrically connected to a controller. When the contact plane 15 is in contact with the surface of the base material 16, the controller, conductive terminals 11, and base material 16 form a contact control circuit. When the contact plane separates from the base material surface, the contact control circuit is disconnected. Separation of any contact of the conductive terminals 11 from the base material surface constitutes separation of the contact plane from the base material surface, and this must be manually confirmed not to be due to local defects such as weld slag or pits on the workpiece surface.

[0052] In this embodiment, the testing mechanism can ensure that the measurement operation can only be performed when the device is fully in contact with the surface of the base material, effectively preventing result deviations caused by device tilting or warping, and further ensuring measurement accuracy.

[0053] An insulating threaded sleeve is provided between the measuring device body 1 and the conductive terminal 11. The depth to which the conductive terminal is screwed into the insulating threaded sleeve can be adjusted to keep the contact plane between each conductive terminal and the measuring device body on the same plane.

[0054] It should be noted that the lower surface of the conductive terminal 11 needs to be machined with high precision to ensure that the lower surface of the conductive terminal is in contact with the contact surface; by adjusting the depth of the conductive terminal 11 screwed into the insulating threaded sleeve, the sensitivity of the detection mechanism is improved, and the failure of the detection mechanism due to external force or wear is avoided, thereby further improving the service life of the entire measuring device.

[0055] The end of the contact plane 15 is provided with a weld contact portion; the weld contact portion is provided with a contact block 10, the contact block 10 is provided with an un-chamfered corner for measuring fillet welds, the contact block is detachably connected to the measuring device body, so that the contact block can be replaced in time when it is deformed or worn, and avoids the accuracy of the measuring device being affected by wear.

[0056] It should be noted that: the un-chamfered corner is an acute angle, which is prone to deformation due to collision during measurement; the un-chamfered corner is an obtuse angle, which is prone to interference between the weld contact part and the workpiece under test, affecting the accuracy of the measurement. In this embodiment, the un-chamfered corner is 90 degrees, which avoids the defect of the acute angle being prone to collision and deformation, and can effectively prevent the workpiece interference problem caused by the obtuse angle, ensuring that the weld contact part and the workpiece under test are accurately fitted, and improving the overall stability and accuracy of the measurement.

[0057] A magnet 12 is provided on the contact plane of the measuring device body 1. The magnet 12 attracts the base material 16 to assist in the automatic bonding of the measuring device body 1 and the base material 16. Through the magnetic attraction between the magnet 12 and the base material 16, the automatic bonding and positioning of the measuring device body and the base material to be measured is achieved, which can effectively reduce the manual pressing and fixing operation steps, ensure that the measuring device and the base material are tightly bonded, and improve the stability and measurement accuracy during the measurement process.

[0058] The measuring device body 1 is provided with an electric locking mechanism 3 for limiting the sliding of the scale. The electric locking mechanism 3 is electrically connected to the controller. The initial state of the electric locking mechanism 3 is to lock the scale.

[0059] It should be noted that: In this embodiment, the electric locking mechanism 3 adopts an existing locking mechanism, which includes, but is not limited to, electromagnet adsorption locking and motor-driven friction clamping locking; when the electromagnet adsorption locking is energized, the electromagnet attracts the brake pad and presses the scale body or slider; the motor-driven friction clamping locking is a micro geared motor that drives the cam, eccentric wheel or clamping block to squeeze the scale sliding pair and achieve locking by friction.

[0060] When the testing agency detects that the contact plane 15 is in contact with the surface of the base material 16, the controller controls the electric locking mechanism 3 to release the lock on the scale.

[0061] When the detection agency detects that the contact plane 15 is separated from the surface of the base material 16, the controller restores the electric locking mechanism 3 to its initial state.

[0062] The start button 13 and the stop button 14 are installed on the measuring device body 1 and are used to control the power supply of the device to be turned on and off, respectively.

[0063] It should be noted that the power supply provides power to the controller, detection mechanism, and electric locking mechanism. The start and stop buttons control the power supply of the device, enabling convenient start and stop control of the measuring device's power supply. The operation is simple and intuitive, allowing operators to quickly start or stop the equipment. At the same time, it can effectively prevent the device from being accidentally powered on or started, improving the safety and ease of operation of the equipment.

[0064] The specific work process is as follows:

[0065] The testing contact plane 15 of the testing mechanism is brought into contact with the surface of the base material 16, and the controller controls the electric locking mechanism 3 to release the locking of the scale 2; the extension length of the scale 2 is manually adjusted.

[0066] Under the action of external force, the measuring device body 1 is pushed to move towards the upright plate 17 which is welded to the base material. The upright plate 17 pushes the scale 2 to slide towards the measuring device body. When the weld contact part contacts the fillet weld 18, the detection mechanism detects that the contact plane 15 is separated from the surface of the base material 16, and the size of the fillet weld is read by the scale 2.

[0067] Example 2

[0068] This embodiment provides a method for using a fillet weld leg size measuring device. The method is applicable to the fillet weld leg size measuring device described in Embodiment 1, and includes the following steps:

[0069] The measuring device is started by pressing the start button 13, and the power supply provides power to the controller, the detection mechanism and the electric locking mechanism.

[0070] The testing contact plane 15 of the testing mechanism is attached to the surface of the base material 16. Through the magnetic attraction between the magnet 12 and the base material 16, the automatic attachment and positioning of the measuring device body 1 and the base material 16 to be tested are achieved.

[0071] When the testing mechanism detects that the contact plane 15 is in contact with the surface of the base material 16, the controller, conductive terminal 11 and base material 16 form a contact control circuit. The controller controls the electric locking mechanism 3 to release the locking of the scale 2; the extension length of the scale 2 is manually adjusted.

[0072] Under the action of external force, the measuring device body 1 is pushed to move towards the upright plate 17 which is welded to the base material. The upright plate 17 pushes the scale 2 to slide towards the measuring device body. When the weld contact part contacts the fillet weld 18, since the weld height is higher than the base material, the measuring device body 1 is forced to rise, the contact plane 15 separates from the surface of the base material 16, and the contact control circuit is disconnected.

[0073] When the testing agency detects that the contact plane is separated from the surface of the base material, the controller restores the electric locking mechanism 3 to its initial state. The electric locking mechanism 3 locks the scale 2 again, and the hand will feel that it is no longer possible to push the measuring device body. The size of the fillet weld is read by the scale 2.

[0074] After the measurement is completed, turn off the measuring device by pressing the off button 14 and disconnect the power to the controller, detection mechanism and electric locking mechanism.

[0075] The detection mechanism replaces the existing measurement method that relies on the operator's sense of touch to determine when the scale can no longer be pushed, fundamentally eliminating measurement errors caused by differences in the operator's force and feel, and significantly improving measurement accuracy and result consistency. Once the scale is in place, the electric locking mechanism can promptly lock it, effectively fixing its extended position and preventing slippage during measurement. This avoids measurement data deviation caused by scale displacement and ensures stable and reliable measurement.

[0076] Example 3

[0077] This embodiment provides a fillet weld leg size measuring device. In this embodiment, the electric locking mechanism in Embodiment 1 is replaced with a prompting mechanism. The measuring device body is provided with a prompting mechanism, and the controller is electrically connected to the prompting mechanism. When the detection mechanism detects that the contact plane is separated from the base material surface, the prompting mechanism emits a prompting signal. The prompting mechanism is a prompting light or a speaker.

[0078] The specific work process is as follows:

[0079] Manually adjust the extension length of the scale 2;

[0080] The detection contact plane 15 of the detection mechanism is attached to the surface of the base material 16. Under the action of external force, the measuring device body 1 is pushed to move towards the upright plate 17 which is corner-welded to the base material. The upright plate 17 pushes the scale 2 to slide towards the measuring device body.

[0081] When the weld contact part comes into contact with the fillet weld 18, and the detection mechanism detects that the contact plane 15 is separated from the surface of the base material 16, the prompting mechanism issues a prompting signal. After the user hears or sees the prompting signal, the fillet weld size is read by the scale 2.

[0082] Example 4

[0083] This embodiment provides a fillet weld leg size measuring device. This embodiment adds a prompting mechanism to the fillet weld leg size measuring device disclosed in Embodiment 1. The measuring device body is provided with a prompting mechanism, and the controller is electrically connected to the prompting mechanism. When the detection mechanism detects that the contact plane is separated from the base material surface, the prompting mechanism emits a prompting signal. The prompting mechanism is a prompting light or a speaker.

[0084] The specific work process is as follows:

[0085] The testing contact plane of the testing mechanism is brought into contact with the surface of the base material, and the controller controls the electric locking mechanism 3 to release the locking of the scale 2; the extension length of the scale is manually adjusted.

[0086] Under the action of external force, the measuring device body 1 is pushed to move towards the upright plate 17 which is welded to the base material, and the upright plate 17 pushes the scale 2 to slide towards the measuring device body.

[0087] When the weld contact part comes into contact with the fillet weld, and the detection mechanism detects that the contact plane 15 is separated from the surface of the base material 16, the controller restores the electric locking mechanism 3 to its initial state. The electric locking mechanism 3 locks the scale 2 again, and the hand will feel that it is no longer possible to push the measuring device body. At the same time, the prompting mechanism issues a prompting signal. After the user hears or sees the prompting signal, the fillet weld size is read by the scale 2.

[0088] Example 5

[0089] like Figures 1 to 3 As shown, this embodiment provides a fillet weld leg size measuring device. This embodiment adds a handheld component for pushing the measuring device body and a testing mechanism for determining whether the pushing force is greater than a set pushing force threshold to the fillet weld leg size measuring device disclosed in Embodiment 1.

[0090] The handheld component and the inspection mechanism are located in the middle connecting part of the measuring device body; the handheld component is a push rod 7, and the measuring device body 1 is provided with a plurality of slide rods 6. The push rod 7 is provided with a through hole that cooperates with the slide rod 6, and the push rod 7 is slidably connected to the slide rod 6 through the through hole; a spring 5 is provided between the push rod 7 and the measuring device body 1.

[0091] The instruction manual requires that the elastic force of spring 5 is greater than the sum of the frictional force between the base material and the measuring device body and the frictional force between the scale and the measuring device body, to ensure that the measuring device body can be pushed normally during the measurement process.

[0092] The inspection mechanism consists of a first contact conductor 8 and a second contact conductor 9; the first contact conductor 8 and the second contact conductor 9 are respectively disposed on the measuring device body 1 and the push rod 7, and the positions of the first contact conductor 8 and the second contact conductor 9 correspond to each other; the first contact conductor 8 and the second contact conductor 9 are electrically connected to the controller;

[0093] When the push rod is in the initial position, the first contact conductor 8 and the second contact conductor 9 remain separated due to the action of the spring 5. The first contact conductor 8 and the second contact conductor 9 form a pair of measurement stop contacts. When the pushing force is greater than the set pushing force threshold, the first contact conductor 8 and the second contact conductor 9 come together to form a closed circuit.

[0094] Alternatively, the inspection mechanism can be a pressure sensor, which has a connection between a spring and the measuring device body or a spring and a push rod. The pressure sensor is electrically connected to a controller, which determines whether the thrust on the measuring device body is greater than a set thrust threshold based on the pressure information detected by the pressure sensor.

[0095] The measuring device body 1 and the push rod 7 are provided with insulating threaded sleeves. The first contact conductor 8 and the second contact conductor 9 are screwed into the corresponding insulating threaded sleeves. The screwing depth of the first contact conductor and the second contact conductor can be adjusted to change the set thrust threshold.

[0096] It should be noted that this embodiment can also add a handheld component for pushing the measuring device body and an inspection mechanism for judging whether the thrust is greater than the set thrust threshold to the fillet weld leg size measuring device disclosed in Embodiment 3 or 4.

[0097] Example 6

[0098] This embodiment provides a method for using a fillet weld leg size measuring device. The control method is applicable to the fillet weld leg size measuring device described in Embodiment 5. The method of use includes:

[0099] The measuring device is started by pressing the start button 13, and the power supply provides power to the controller, inspection mechanism, testing mechanism and electric locking mechanism 3.

[0100] The testing contact plane 15 of the testing mechanism is attached to the surface of the base material 16. Through the magnetic attraction between the magnet 12 and the base material, the measuring device body and the base material to be tested are automatically attached and positioned.

[0101] When the testing mechanism detects that the contact plane 15 is in contact with the surface of the base material 16, the controller, conductive terminal 11 and base material 16 form a contact control circuit. The controller controls the electric locking mechanism 3 to release the locking of the scale 2; the extension length of the scale 2 is manually adjusted.

[0102] By applying a pushing force to the measuring device body 1 through the handheld component, the measuring device body 1 is pushed to move towards the upright plate 17 which is corner-welded to the base material under the action of external force, and the upright plate 17 pushes the scale 2 to slide towards the measuring device body.

[0103] When the weld contact part contacts the fillet weld 18, the measuring device body 1 is forced to rise because the weld height is higher than the base material, the contact plane 15 separates from the surface of the base material 16, and the contact control circuit is disconnected; or, the weld hinders the movement of the measuring device body 1, and when the thrust is greater than the set thrust threshold, the first contact conductor 8 and the second contact conductor 9 come together to form a closed circuit.

[0104] When the testing mechanism detects that the contact plane 15 is separated from the surface of the base material 16, or the thrust is greater than the set thrust threshold, the controller restores the electric locking mechanism 3 to its initial state. The electric locking mechanism 3 locks the scale 2 again, and the hand will feel that it is no longer possible to push the measuring device body. The size of the fillet weld is read by the scale 2.

[0105] After the measurement is completed, turn off the measuring device by pressing the off button 14, and disconnect the power to the controller, inspection mechanism, testing mechanism and electric locking mechanism.

[0106] This embodiment uses the magnitude of the thrust as the measurement trigger condition, which fundamentally eliminates measurement errors caused by differences in the force applied by the operator and differences in their feel, and effectively avoids errors caused by differences in human operating experience and operating delays.

[0107] This embodiment uses the separation of the contact plane from the surface of the base material as the trigger condition, ensuring that the measurement operation can only be performed when the device is fully in contact with the surface of the base material. This effectively prevents result deviations caused by device tilting or warping, and further ensures measurement accuracy.

[0108] The two triggering mechanisms work together to accurately capture the optimal measurement moment, ensuring that each measurement is completed under uniform standard working conditions, improving the consistency and repeatability of measurement results, reducing the impact of external factors on the test results, and significantly improving the accuracy, reliability and standardization of fillet weld size inspection.

[0109] Once the detection is complete, the electric locking mechanism can lock the scale in time, effectively fixing the extended position of the scale, preventing the scale from sliding or shifting during measurement, avoiding measurement data deviation caused by scale displacement, and ensuring stable and reliable measurement position.

[0110] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A weld toe size measurement device for a fillet weld, the device comprising: Includes a measuring device body; the measuring device body includes a contact plane for contacting the surface of the base material and a retractable scale. The measuring device body is equipped with a detection mechanism capable of detecting whether the contact plane is in contact with the surface of the base material; the end of the contact plane is provided with a weld contact portion; The contact plane is in contact with the surface of the base material. Under the action of external force, the measuring device body moves towards the upright plate that is corner welded to the base material. The upright plate pushes the scale to slide. When the weld contact part contacts the fillet weld, the detection mechanism detects that the contact plane is separated from the surface of the base material, and the size of the fillet weld is read by the scale.

2. The weld toe size measurement device of claim 1, wherein, The testing mechanism includes several conductive terminals, which are spaced apart on the contact plane of the measuring device body; the conductive terminals are electrically connected to the controller; when the contact plane is in contact with the surface of the base material, the controller, conductive terminals and base material form a contact control circuit; when the contact plane is separated from the surface of the base material, the contact control circuit is disconnected.

3. The weld toe size measurement device of claim 2, wherein, An insulating threaded sleeve is provided between the measuring device body and the conductive terminals. The depth to which the conductive terminals are screwed into the insulating threaded sleeve can be adjusted to keep the contact planes of each conductive terminal and the measuring device body on the same plane.

4. The weld toe size measurement device of claim 1, wherein, The measuring device body is provided with a slide rail; the scale is slidably connected to the measuring device body along the slide rail; the measuring device body is provided with a pointer or edge to assist in reading the scale.

5. The weld toe size measurement device of claim 1, wherein, The weld contact portion is provided with a contact block, which has an un-chamfered corner for measuring fillet welds. The contact block is detachably connected to the measuring device body.

6. The weld toe size measurement device of claim 1, wherein, The contact surface of the measuring device body is provided with a magnet, which attracts the base material to assist the measuring device body and the base material in automatic bonding.

7. The weld toe size measurement device of any one of claims 1 to 6, wherein, The measuring device body is equipped with a handheld component for pushing the measuring device body and a testing mechanism for determining whether the thrust is greater than the set thrust threshold; when the thrust is greater than the set thrust threshold, the fillet weld size is read by a scale.

8. The weld toe size measurement device of claim 7, wherein, The handheld component is a push rod, and the measuring device body is provided with several sliding rods. The push rod is provided with a through hole that cooperates with the sliding rod, and the push rod is slidably connected to the sliding rod through the through hole; a spring is provided between the push rod and the measuring device body.

9. The weld toe size measurement device of claim 8, wherein, The testing mechanism consists of a first contact conductor and a second contact conductor; the first contact conductor and the second contact conductor are respectively disposed on the measuring device body and the push rod, and the positions of the first contact conductor and the second contact conductor correspond to each other; the first contact conductor and the second contact conductor are electrically connected to the controller; When the thrust exceeds the set thrust threshold, the first contact conductor and the second contact conductor come together to form a closed loop.

10. The fillet weld leg size measuring device according to claim 7, characterized in that, The measuring device body is equipped with an electric locking mechanism for limiting the sliding of the scale, and the electric locking mechanism is electrically connected to the controller; the initial state of the electric locking mechanism is to lock the scale. When the testing agency detects the contact plane's fit with the base material surface, the controller activates the electric locking mechanism to release the scale. When the testing agency detects that the contact plane separates from the surface of the base material, or when the thrust on the measuring device body exceeds the set thrust threshold, the controller restores the electric locking mechanism to its initial state.

11. The fillet weld leg size measuring device according to claim 7, characterized in that, The measuring device body includes a first end connection part, a second end connection part, and an intermediate connection part; the first end connection part, the intermediate connection part, and the second end connection part are connected in sequence to form a C-shape; the scale is disposed in the first end connection part, the handheld component and the inspection mechanism are disposed in the intermediate connection part; the weld contact part, the contact plane and the detection mechanism are disposed in the second end connection part.

12. The fillet weld leg size measuring device according to claim 1, characterized in that, The start and stop buttons are installed on the measuring device body and are used to control the power supply of the device to be turned on and off, respectively.

13. The method of using the fillet weld leg size measuring device according to any one of claims 1 to 12, characterized in that, include: The contact plane is in contact with the surface of the base material, and the measuring device body moves towards the vertical plate that is corner-welded to the base material under the action of external force, and the vertical plate pushes the scale to slide. When the weld contact portion comes into contact with the fillet weld, and the inspection mechanism detects that the contact plane is separated from the base material surface, the fillet weld size is read by a scale.

14. The method of use according to claim 13, characterized in that, The measuring device body is equipped with a handheld component for pushing the measuring device body and a testing mechanism for determining whether the thrust is greater than the set thrust threshold; when the thrust is greater than the set thrust threshold, the fillet weld size is read by a scale.

15. The method of use according to claim 14, characterized in that, The measuring device body is equipped with an electric locking mechanism for limiting the sliding of the scale. The electric locking mechanism, the inspection mechanism, and the detection mechanism are electrically connected to the controller. The initial state of the electric locking mechanism is to lock the scale. When the testing agency detects the contact plane's fit with the base material surface, the controller activates the electric locking mechanism to release the scale. When the testing agency detects that the contact plane separates from the surface of the base material, or when the thrust on the measuring device body exceeds the set thrust threshold, the controller restores the electric locking mechanism to its initial state.

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