Stud Welding Bending Test Detection Device and Detection Method

Abstract

The present invention relates to a stud welding bending test detection device and a detection method. The detection device includes a cylindrical fixture for clamping a stud and a sleeve sleeved on the cylindrical fixture, wherein: the length of the sleeve is greater than the length of the cylindrical fixture, and a locking structure for locking the position of the cylindrical fixture is provided at a first end of the sleeve; the fixture includes a cylindrical body and a plurality of telescopic clamping pins. A plurality of jacks for respectively inserting the plurality of telescopic clamping pins are arranged at an end of the cylindrical body. One end of the telescopic clamping pin is connected to the bottom of the corresponding jack through a spring, and the other end extends out of the corresponding jack under the spring reset state and forms a clamping section for restricting the movement of the stud in the radial direction. In the present invention, the stud is clamped by the fixture densely distributed with telescopic clamping pins, so that the fixture can automatically adapt to studs of different sizes and ensure the reliability of clamping the stud, thereby ensuring the detection quality. In addition, in cooperation with the lever principle, the operation is convenient, time-saving and labor-saving.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure construction inspection, and particularly relates to a stud welding bending test inspection device and an inspection method. Background Art

[0002] With the increasing popularity of the prefabricated steel structure field, the steel-concrete composite structure composed of steel structure and concrete structure has been vigorously developed. In order to ensure the full combination of concrete and steel structure, studs have become the optimal choice, greatly improving the shear resistance and integrity of concrete and steel structure.

[0003] At present, the studs of the stiffening structure are mainly divided into two parts: the processing factory and the construction site. The components processed by the processing factory need to be shipped to the construction site, and the welding quality of the studs needs to be inspected when they enter the site. The construction site is mainly profiled steel sheet or steel bar truss floor slab, and studs need to be welded on the steel beam. At present, the inspection method for stud welding quality is mainly to detect by observing whether there are cracks with the naked eye after hammering. According to the specification requirements, the inspection quantity is 10% sampling inspection. There are often hundreds of thousands of studs to be welded on the floor slab at the construction site. The method of hammering not only has low efficiency, but also often has poor inspection effect on the welding quality of studs due to different hammering positions each time and the need to lie down and observe closely. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a stud welding bending test inspection device and an inspection method. The stud is clamped by a fixture densely arranged with telescopic needles, which can adapt to studs of different sizes and specifications. At the same time, the stud is bent by using the lever principle, which is time-saving, labor-saving and highly efficient.

[0005] The present invention is realized by the following scheme: A stud welding bending test inspection device includes a cylindrical fixture for clamping the stud and a sleeve sleeved on the cylindrical fixture, wherein:

[0006] The length of the sleeve is greater than the length of the cylindrical fixture, and a locking structure for locking the position of the cylindrical fixture is provided at the first end of the sleeve;

[0007] The fixture includes a cylindrical body and a plurality of telescopic needles. A plurality of insertion holes for inserting the plurality of telescopic needles are arranged at the end of the cylindrical body. One end of the telescopic needle is connected to the bottom of the corresponding insertion hole through a spring, and the other end extends out of the corresponding insertion hole in the spring reset state and forms a clamping section for restricting the radial movement of the stud.

[0008] The present invention clamps studs by a fixture densely provided with telescopic pins, enabling the fixture to automatically adapt to studs of different sizes and ensuring the reliability of clamping the studs, thereby guaranteeing the detection quality. Additionally, by leveraging the lever principle to bend the studs, the operation is convenient, time-saving, labor-saving, and highly efficient.

[0009] A further improvement of the stud welding bending test detection device of the present invention lies in that the locking structure includes at least one row of through holes opened along the length direction of the sleeve, and at least one spring buckle adapted to the through holes is provided on the outer periphery of the cylindrical fixture. In the state where the sleeve is sleeved on the cylindrical fixture, the positions of at least one spring buckle and at least one row of through holes are axially aligned one by one.

[0010] A further improvement of the stud welding bending test detection device of the present invention lies in that a first guiding member is axially provided on the inner wall of the sleeve, and a second guiding member adapted to be fitted with the first guiding member is provided on the outer periphery of the cylindrical fixture.

[0011] A further improvement of the stud welding bending test detection device of the present invention lies in that a camera for collecting image information of the stud fixing surface is further installed at the first end of the sleeve, and a display for acquiring and imaging the image information is installed at the second end of the sleeve.

[0012] A further improvement of the stud welding bending test detection device of the present invention lies in that a magnetic coil is further installed at a position within the acquisition range of the camera at the first end.

[0013] A further improvement of the stud welding bending test detection device of the present invention lies in that a center of gravity sensor for real-time detecting the center of gravity position of the sleeve and sending it to the display is installed on the sleeve.

[0014] The present invention also provides a stud welding bending test detection method, including the steps of:

[0015] Providing the above-mentioned stud welding bending test detection device;

[0016] Sleeving the sleeve on the cylindrical fixture, moving the cylindrical fixture to a specified elevation position of the sleeve according to the length of the stud, and locking the cylindrical fixture to the specified elevation position by using the locking structure;

[0017] Placing the sleeve with the cylindrical fixture at the stud and making the end of the cylindrical fixture provided with telescopic pins face the stud;

[0018] Bring the cylindrical fixture close to the stud. When the stud presses the opposite telescopic needle to the retracted state, apply force to the second end of the sleeve using the lever principle. Under the radial limiting effect of the clamping section of the telescopic needle that avoids the stud, bend the stud to a certain angle.

[0019] Observe whether there are cracks on the fixing surface of the stud.

[0020] A further improvement of the stud welding bending test detection method of the present invention lies in:

[0021] A camera is also installed at the first end of the sleeve, and a display is installed at the second section of the sleeve;

[0022] When observing whether there are cracks on the fixing surface of the stud, turn on the camera and the display. Use the camera to collect the image information of the fixing surface of the stud, and use the display to obtain the image information and form an image. Observe whether there are cracks in the image displayed on the display.

[0023] A further improvement of the stud welding bending test detection method of the present invention lies in:

[0024] A magnetic coil is also installed at the position of the first end within the camera collection range;

[0025] When observing whether there are cracks in the image displayed on the display, if it is impossible to directly see whether there are cracks, turn on the switch of the magnetic coil to form a magnetic field, and then spray liquid magnetic powder within the magnetic field range. Observe whether there are magnetic marks in the image displayed on the display.

[0026] A further improvement of the stud welding bending test detection method of the present invention lies in:

[0027] A center of gravity sensor is installed on the sleeve;

[0028] During the process of applying force to the second section of the sleeve, the center of gravity position of the sleeve is detected in real time by the center of gravity sensor and sent to the display. Determine whether the stud is bent to a certain angle according to the center of gravity position information displayed on the display. If so, stop applying force to the sleeve. Description of the Drawings

[0029] Figure 1 Shows a three-dimensional structural schematic diagram of the stud welding bending test detection device of the present invention.

[0030] Figure 2 Shows a three-dimensional structural schematic diagram of the cylindrical fixture in the present invention.

[0031] Figure 3 Shows a layout schematic diagram of the camera and the magnetic coil in the present invention. Specific Embodiment

[0032] In order to solve the problems of low detection efficiency and poor detection effect of traditional stud welding quality test and detection devices and methods, the present invention provides a stud welding bending test and detection device and method. The stud is clamped by a fixture densely distributed with telescopic needles, which can adapt to studs of different sizes and specifications. At the same time, the lever principle is used to bend the stud, saving time and effort and having high efficiency.

[0033] The following further describes the stud welding bending test and detection device and method with specific embodiments in conjunction with the drawings.

[0034] Refer to Figure 1 and Figure 2 As shown, a stud welding bending test and detection device includes a cylindrical fixture 2 for clamping a stud 3 and a sleeve 1 sleeved on the cylindrical fixture 2, wherein:

[0035] The length of the sleeve 1 is greater than the length of the cylindrical fixture 2, and a locking structure for locking the position of the cylindrical fixture 2 is provided at the first end of the sleeve 1;

[0036] The fixture 2 includes a cylindrical body 21 and a plurality of telescopic needles 22. A plurality of insertion holes for respectively inserting the plurality of telescopic needles 22 are arranged at the end of the cylindrical body 21. One end of the telescopic needle 22 is connected to the bottom of the corresponding insertion hole through a spring, and the other end extends out of the corresponding insertion hole in the spring reset state and forms a clamping section for restricting the movement of the stud 3 in the radial direction.

[0037] The stud 3 to be detected is clamped by the cylindrical fixture 2. By applying an external force to the second end of the sleeve 1 away from the fixture 2 in cooperation with the lever principle, the sleeve 1 drives the cylindrical fixture 2, and then drives the clamped section of the stud 3 to tilt. The unclamped section of the stud 3 remains stationary due to the welding fixation at the end, so the bending of the stud 3 is realized. For the convenience of applying force, a force application handle 12 is provided at the second end of the sleeve 1 in this embodiment.

[0038] The present invention clamps the stud by a fixture densely distributed with telescopic needles, enabling the fixture to automatically adapt to studs of different sizes and ensuring the reliability of clamping the stud, thereby ensuring the detection quality. In addition, the lever principle is used to bend the stud, which is convenient to operate, saves time and effort, and has high efficiency.

[0039] As a preferred embodiment, the locking structure includes at least one row of through holes 11 opened along the length direction of the sleeve 1. At least one spring buckle 23 adapted to the through holes 11 is provided on the outer periphery of the cylindrical fixture 2. In the state where the sleeve 1 is sleeved on the cylindrical fixture 2, the positions of at least one spring buckle 23 and at least one row of through holes 11 are axially aligned one by one. Specifically, in this embodiment, the number of the spring buckles 23 is three, and they are evenly spaced along the circumferential direction of the cylindrical fixture 2. Correspondingly, there are three rows of through holes 11, and the three rows of through holes are evenly spaced along the axial direction of the sleeve 1. By adopting the form of three groups of adapted clamping, the cylindrical fixture 2 can be stably and reliably locked at a specified position. Further, in order to ensure that when the cylindrical fixture 2 is moved, the three spring buckles 23 can always be axially aligned with the three rows of through holes 11 respectively, it should be ensured that the cylindrical fixture 2 does not rotate when moving along the sleeve 1. Therefore, in this embodiment, a first guiding member is provided on the inner wall of the sleeve 1 along the axial direction, and a second guiding member adapted to be fitted with the first guiding member is provided on the outer periphery of the cylindrical fixture 2. Specifically, the first guiding member and the second guiding member can be a guiding groove and a guiding rib that are adapted to be fitted with each other.

[0040] Of course, the locking structure is not limited to the above structure: the two ends of the cylindrical fixture 2 can also be blocked by using the above through holes 11 and bolts to lock the position of the cylindrical fixture 2; the through holes can also be replaced with threaded holes, and the position of the cylindrical fixture 2 can be locked by selectively screwing an adapted bolt into the threaded hole and abutting against the cylindrical fixture 2; the above two methods both eliminate the setting of the spring buckles 23. Any other structural form that can achieve the position locking of the cylindrical fixture can also be adopted.

[0041] As a preferred embodiment, in cooperation Figure 3 As shown, a camera 5 for collecting image information of the stud fixing surface is further installed at the first end of the sleeve 1, and a display 4 for obtaining and imaging the image information is installed at the second end of the sleeve 1.

[0042] Specifically, in order to completely cover the stud fixing surface, in this embodiment, the number of the cameras 5 is set to two, and the two cameras 5 are relatively fixed at the ports of the first end of the sleeve. After the stud 3 is bent to a certain angle, the image of the stud fixing surface can be directly displayed on the display 4. It is only necessary to observe whether there are cracks in the image, avoiding frequent looking down for observation, which is convenient, labor-saving and improves the detection efficiency.

[0043] As a preferred embodiment, a magnetic coil 6 is further installed at a position within the collection range of the camera 5 at the first end.

[0044] Specifically, the magnetic coil 6 is disposed at the port of the first end of the sleeve and is laid along the inner wall of the sleeve 1 in a circle. By setting the magnetic coil 6, when there is doubt about the image observation result, liquid magnetic powder can also be sprayed at the root of the stud 3, and the switch of the magnetic coil is turned on to form a magnetic field. The surface of the crack defect will undergo local distortion to generate a leakage magnetic field, and uneven magnetic powder will be adsorbed to form obvious magnetic marks, which is beneficial to further determine whether the welding quality of the stud is qualified.

[0045] As a preferred embodiment, a gravity sensor 7 for real-time detecting the gravity center position of the sleeve 1 and sending it to the display 4 is installed on the sleeve 1.

[0046] By setting the gravity sensor 7, it is convenient to observe the gravity center position of the sleeve 1 in real time, that is, to observe the bending angle of the stud 3 in real time, so as to control the bending angle of the stud 3 and make the detection result more accurate. Of course, an auxiliary level bubble can also be set on the sleeve 1, and the inclination of the sleeve 1 can be directly observed by the naked eye, and then the bending angle of the stud 3 can be controlled. However, this method is applicable to occasions where the accuracy requirement for the bending angle is not very high.

[0047] The present invention also provides a method for detecting the bending test of stud welding. Refer to Figures 1 to 3 as shown, including the steps:

[0048] Step 1: Provide the above-mentioned stud welding bending test detection device.

[0049] Step 2: Sleeve the sleeve 1 on the cylindrical fixture 2, move the cylindrical fixture 2 to the specified elevation position of the sleeve 1 according to the length of the stud 3, and lock the cylindrical fixture 2 to the specified elevation position by using the locking structure;

[0050] Step 3: Place the sleeve with the cylindrical fixture 2 at the position of the stud 3, and make the end of the cylindrical fixture 2 provided with the telescopic needle 22 face the stud 3;

[0051] Step 4: Make the cylindrical fixture 2 approach the stud 3. When the stud 3 presses the opposite telescopic needle 22 to the retracted state, apply force to the second end of the sleeve 1 using the lever principle. Under the radial limiting action of the clamping section of the telescopic needle 22 of the stud 3 being avoided, bend the stud 3 to a certain angle.

[0052] Step 5: Observe whether there are cracks on the fixing surface of the stud. To achieve the purpose of detecting whether the welding quality of the stud is qualified.

[0053] As a preferred embodiment:

[0054] A camera 5 is further installed at the first end of the sleeve 1, and a display 4 is installed at the second end of the sleeve 1;

[0055] When observing whether there are cracks on the stud fixing surface, turn on the camera 5 and the display 3. Use the camera 5 to collect the image information of the stud fixing surface, and use the display 3 to obtain the image information and form an image. Observe whether there are cracks in the image displayed on the display 3.

[0056] By adopting the above method, it is possible to avoid frequent lowering of the head for observation, which is convenient and labor-saving, and improves the detection efficiency.

[0057] As a preferred embodiment:

[0058] A magnetic coil 6 is also installed at a position where the first end portion is within the collection range of the camera;

[0059] When observing whether there are cracks in the image displayed on the display 4, if it is impossible to directly see whether there are cracks, turn on the switch of the magnetic coil to form a magnetic field, and then spray liquid magnetic powder within the magnetic field range. Observe whether there are magnetic marks in the image displayed on the display 4.

[0060] By adopting the above method, the accuracy of detection is further improved.

[0061] As a preferred embodiment:

[0062] A center of gravity sensor 7 is installed on the sleeve 1;

[0063] During the process of applying force to the second end portion of the sleeve 1, the center of gravity position of the sleeve 1 is detected in real time by the center of gravity sensor 7 and sent to the display 4. According to the center of gravity position information displayed on the display 4, it is determined whether the stud 3 is bent to a certain angle. If so, stop applying force to the sleeve 1.

[0064] By setting the center of gravity detector 7, it is beneficial to control the bending angle of the stud 3, making the detection result more accurate. Of course, an auxiliary level bubble can also be set on the sleeve 1, and the inclination of the sleeve 1 can be directly observed by the naked eye, thereby realizing the control of the bending angle of the stud 3. However, this method is applicable to occasions where the accuracy requirement for the bending angle is not very high.

[0065] The present invention has been described in detail above in combination with the embodiments with reference to the drawings. Those of ordinary skill in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation to the present invention, and the present invention will take the scope defined by the appended claims as the protection scope of the present invention.

Claims

1. A stud welding bending test detection device, characterized in that, it includes a cylindrical fixture for clamping the stud and a sleeve sleeved on the cylindrical fixture, wherein: the length of the sleeve is greater than the length of the cylindrical fixture, and a locking structure for locking the position of the cylindrical fixture is provided at the first end of the sleeve; the fixture includes a cylindrical body and a plurality of telescopic clamping pins. A plurality of jacks for respectively inserting the plurality of telescopic clamping pins are arranged at the end of the cylindrical body. One end of the telescopic clamping pin is connected to the bottom of the corresponding jack through a spring, and the other end extends out of the corresponding jack in the spring reset state and forms a clamping section for restricting the movement of the stud in the radial direction.

2. The stud welding bending test detection device according to claim 1, characterized in that, the locking structure includes at least one row of through holes opened along the length direction of the sleeve, and at least one spring buckle adapted to the through holes is provided on the outer periphery of the cylindrical fixture. In the state where the sleeve is sleeved on the cylindrical fixture, the positions of at least one spring buckle and at least one row of through holes are axially aligned one by one.

3. The stud welding bending test detection device according to claim 2, characterized in that, a first guide is provided on the inner wall of the sleeve along the axial direction, and a second guide adapted to the first guide is provided on the outer periphery of the cylindrical fixture.

4. The stud welding bending test detection device according to claim 1, characterized in that, a camera for collecting image information of the stud fixing surface is further installed at the first end of the sleeve, and a display for acquiring and imaging the image information is installed at the second end of the sleeve.

5. The stud welding bending test detection device according to claim 4, characterized in that, a magnetic coil is further installed at a position within the collection range of the camera at the first end.

6. The stud welding bending test detection device according to claim 4, characterized in that, a gravity sensor for real-time detecting the gravity center position of the sleeve and sending it to the display is installed on the sleeve.

7. A stud welding bending test detection method, characterized in that, it includes steps: providing the stud welding bending test detection device according to claim 1; sleeving the sleeve on the cylindrical fixture, moving the cylindrical fixture to the specified elevation position of the sleeve according to the length of the stud, and locking the cylindrical fixture to the specified elevation position by using the locking structure; placing the sleeve with the cylindrical fixture at the stud, and making the end of the cylindrical fixture with the telescopic clamping pins face the stud; bringing the cylindrical fixture close to the stud. When the stud presses the facing telescopic clamping pin to the retracted state, applying force to the second end of the sleeve by using the lever principle, and bending the stud to a certain angle under the radial limiting action of the clamping section of the telescopic clamping pin avoiding the stud; observing whether there are cracks on the stud fixing surface.

8. The stud welding bending test detection method according to claim 7, characterized in that: a camera is further installed at the first end of the sleeve, and a display is installed at the second end of the sleeve; When observing whether there are cracks on the stud fixing surface, turn on the camera and the display, use the camera to collect the image information of the stud fixing surface, use the display to obtain the image information and form an image, and observe whether there are cracks in the image displayed on the display.

9. The stud welding bending test detection method according to claim 8, characterized in that: a magnetic coil is further installed at a position where the first end portion is within the range collected by the camera; When observing whether there are cracks in the image displayed on the display, if it is impossible to directly see whether there are cracks, turn on the switch of the magnetic coil to form a magnetic field, and then spray liquid magnetic powder within the magnetic field range, and observe whether there are magnetic marks in the image displayed on the display.

10. The stud welding bending test detection method according to claim 8, characterized in that: a center of gravity sensor is installed on the sleeve; During the process of applying force to the second end portion of the sleeve, the center of gravity position of the sleeve is detected in real time by the center of gravity sensor and sent to the display, and it is determined whether the stud is bent to a certain angle according to the center of gravity position information displayed on the display. If so, stop applying force to the sleeve.

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