CN212483454U - Spot welding solder joint quality detection device - Google Patents
Spot welding solder joint quality detection device Download PDFInfo
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- CN212483454U CN212483454U CN202021798520.9U CN202021798520U CN212483454U CN 212483454 U CN212483454 U CN 212483454U CN 202021798520 U CN202021798520 U CN 202021798520U CN 212483454 U CN212483454 U CN 212483454U
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Abstract
The utility model provides a spot welding solder joint quality detection device, including installing support, excitation module, magneto-optical sensor, wherein, the installing support is U type installing support, and the excitation module sets up the one end at the installing support, and magneto-optical sensor sets up the other end at the installing support, and magneto-optical sensor's output is connected with the input of external host computer. During use, the periphery of a target spot welding test piece is sleeved by a handheld or motor driving device, and the positions of an excitation module and a magneto-optical sensor are adjusted; starting an excitation module, generating an excitation magnetic field by the excitation module, and carrying out magneto-optical image acquisition on welding spots by a magneto-optical sensor and transmitting the magneto-optical image to an upper computer; the upper computer fuses the magneto-optical images of different frequency bands to obtain a defect image, and the shape and appearance of the spot welding defect can be visually displayed in the defect image, so that the quality detection of the welding spot is realized.
Description
Technical Field
The utility model relates to a spot welding solder joint detects technical field, more specifically relates to a spot welding solder joint quality detection device.
Background
Spot welding is an important processing method in the field of manufacturing industry, and has the characteristics of large workload, high quality requirement and the like. Due to the interference of various random factors in the welding process, welding spots of spot welding inevitably have welding defects, such as welding cracks, air holes, incomplete penetration, fusion penetration and the like.
At present, ultrasonic detection methods are mostly adopted for laser spot welding and resistance spot welding, the principle of the ultrasonic detection method is that when ultrasonic waves are transmitted in a detected workpiece, the ultrasonic detection method is influenced by acoustic characteristics of the material of the detected workpiece and changes of internal tissues of the detected workpiece, and changes of material performance and structure are detected through analysis of influence degree and conditions of the ultrasonic waves, for example, a circular welding spot multi-directional vector linear array rotary ultrasonic detection device and a method are provided with the publication number of CN106979981A (published: 2017-07-25). However, the device cannot visually display the shape and the appearance of the welded defects, the operation process is complex, the difficulty of later-stage signal analysis is high, and the device has certain difficulty in distinguishing different types of defects.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome above-mentioned prior art unable visual display spot welding defect's form appearance, and to the defect that has certain degree of difficulty of the different types of defect of difference, provide a spot welding solder joint quality detection device.
In order to solve the technical problem, the technical scheme of the utility model as follows:
the utility model provides a spot welding solder joint quality detection device, includes the installing support, excites the module, the magneto-optical sensor, wherein, the installing support is U type installing support, excites the module setting in the one end of installing support, and the magneto-optical sensor sets up the other end at the installing support, and the output of magneto-optical sensor is connected with the input of external host computer.
In the using process, the periphery of a target spot welding test piece is sleeved by a handheld or motor driving device, and the device is moved to the two sides of the welding point position of the target spot welding test piece, wherein the excitation module and the magneto-optical sensor are respectively arranged on the two sides of the welding point position of the target spot welding test piece; starting an excitation module, wherein the excitation module generates a multi-band excitation magnetic field, and a magneto-optical sensor acquires multi-band magneto-optical images of welding spots and transmits the multi-band magneto-optical images to an upper computer; and the upper computer performs image fusion on the magneto-optical images of different frequency bands to obtain a defect image, and the shape and appearance of the spot welding defect can be visually displayed in the defect image, so that the quality detection of the welding spot is realized.
Preferably, the excitation module comprises an excitation control motor and an electromagnet, wherein an output end of the excitation control motor is electrically connected with an input end of the electromagnet.
Preferably, the electromagnet comprises a dc variable frequency electromagnet.
Preferably, a rotating chassis is arranged on the inner side of one end of the mounting bracket, and the electromagnet is arranged in the center of the rotating chassis.
Preferably, the magneto-optical sensor is embedded in the other end of the mounting bracket, and a sensor window is formed in the inner side surface of the other end of the mounting bracket.
Preferably, the center of the sensor window is disposed coaxially with the center of the electromagnet.
Preferably, the mounting bracket comprises a first bracket and a second bracket, wherein the magneto-optical sensor is arranged at one end of the first bracket, and a hollow hole is formed at the other end of the first bracket; the excitation module is arranged at one end of the second support, and the other end of the second support is connected with the first support in a sliding mode through a hollow hole formed in the first support.
Preferably, the outer side of the first bracket is provided with a mounting part for mounting at the execution end of the multi-axis mechanical arm.
Preferably, the mount comprises a clamp.
Preferably, the apparatus further comprises a stepper motor; a micro guide rail is arranged in a through hole formed in the first support along the relative displacement direction of the second support, and the second support is in sliding connection with the first support through the micro guide rail; the output end of the stepping motor is connected with the driving end of the miniature guide rail, and the stepping motor drives the second support to move on the miniature guide rail.
Compared with the prior art, the utility model discloses technical scheme's beneficial effect is: the utility model discloses an adopt the excitation module to generate the excitation magnetic field, adopt the magneto-optical image of magneto-optical sensor collection solder joint, wherein contain the defect information of the different degree of depth, angle in the magneto-optical image for generate the defect image, can show the form appearance of spot welding defect directly perceivedly, thereby can effectively judge whether the solder joint quality meets the requirements.
Drawings
Fig. 1 is a schematic structural view of a spot welding spot quality detection apparatus according to embodiment 1.
Fig. 2 is a schematic structural view of a spot welding spot quality detection apparatus according to embodiment 2.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
Example 1
The present embodiment provides a spot welding point quality detection device, as shown in fig. 1, which is a schematic structural diagram of the spot welding point quality detection device of the present embodiment.
Among the spot welding spot quality testing device that this embodiment provided, including installing support 1, excitation module 2, magneto-optical sensor 3, wherein, installing support 1 is U type installing support 1, and excitation module 2 sets up the one end at installing support 1, and magneto-optical sensor 3 sets up the other end at installing support 1, and magneto-optical sensor 3's output is connected with the input of external host computer.
In this embodiment, the excitation module 2 includes an excitation control motor 21 and an electromagnet 22, wherein an output end of the excitation control motor 21 is electrically connected to an input end of the electromagnet 22, and the electromagnet 22 is a dc variable frequency electromagnet.
In this embodiment, a rotary chassis 4 is disposed inside one end of the mounting bracket 1, and the electromagnet 22 is disposed in the center of the rotary chassis 4; the magneto-optical sensor 3 is embedded in the other end of the mounting bracket 1, and the inner side surface of the other end of the mounting bracket 1 is provided with a sensor window 5; the center of the sensor window 5 is arranged coaxially with the center of the electromagnet 22. The rotary chassis 4 is used for adjusting the excitation angle of the electromagnet 22, so that multi-angle flaw detection is realized, and the defect missing detection parallel to the magnetic field can be effectively avoided.
In the specific implementation process, the periphery of a target spot welding test piece is sleeved by a handheld or motor driving device, and the device is moved to the excitation module 2 and the magneto-optical sensor 3 which are respectively arranged at two sides of the welding point position of the target spot welding test piece; starting the excitation module 2, generating a multi-band excitation magnetic field by the excitation module 2, and acquiring multi-band magneto-optical images of welding points by the magneto-optical sensor 3 and transmitting the multi-band magneto-optical images to an upper computer; and the upper computer performs image fusion on the magneto-optical images of different frequency bands to obtain a defect image, and the shape and appearance of the spot welding defect can be visually displayed in the defect image, so that the quality detection of the welding spot is realized.
In this embodiment, an excitation magnetic field is generated by a direct-current variable-frequency electromagnet, and a magneto-optical image with defect information is acquired by a magneto-optical sensor 3. As is known from the faraday magneto-optical effect, when a linearly polarized light beam passes through a medium having a magneto-optical activity, if an external magnetic field exists in the medium in the light propagation direction, the vibration plane of the light vibration is deflected after the light passes through the medium, and the deflected light is projected on a photosensitive element to obtain a magneto-optical image. Therefore, the quality detection is carried out by collecting the magneto-optical image of the welding spot position of the spot welding test piece, the morphology and the morphology of the welding spot defect can be visually displayed, and the macroscopic cracks and invisible cracks in the spot welding test piece can be detected.
In addition, considering that the skin effect exists in the alternating magnetic field, the higher the frequency is, the lower the detection depth is, the more sensitive the fine cracks are, therefore, in this embodiment, the working frequency of the electromagnet 22 is changed by the excitation control motor 21, so that the excitation magnetic field with multiple frequency bands is generated, the magneto-optical sensor 3 performs multi-frequency band magneto-optical image acquisition on the welding spot, the loss of defect space information can be effectively compensated, and a better detection effect is achieved.
Example 2
The present embodiment provides a device for detecting quality of a spot welding spot based on embodiment 1, and as shown in fig. 2, the device is a schematic structural diagram of the device for detecting quality of a spot welding spot according to the present embodiment.
In the spot welding spot quality detection device provided by the embodiment, the mounting bracket 1 comprises a first bracket 11 and a second bracket 12, wherein the magneto-optical sensor 3 is arranged at one end of the first bracket 11, and a hollow hole is formed at the other end of the first bracket 11; the excitation module 2 is arranged at one end of the second support 12, and the other end of the second support 12 is connected with the first support 11 in a sliding manner through a hollow hole formed in the first support 11.
In this embodiment, the mounting member 6 is disposed outside the first support 11, and the mounting member 6 in this embodiment is a clamp for clamping, mounting and fixing at the multi-axis robot arm execution end.
The device in the embodiment also comprises a stepping motor; a micro guide rail is arranged in a through hole formed in the first support 11 along the relative displacement direction of the second support 12, and the second support 12 is in sliding connection with the first support 11 through the micro guide rail; the output end of the stepping motor is connected with the driving end of the miniature guide rail, and the stepping motor drives the second support 12 to move on the miniature guide rail.
In the specific process, the whole device is clamped and arranged at the execution end of the multi-axis mechanical arm through the mounting piece 6 arranged on the outer side of the first support 11, the multi-axis mechanical arm is driven by the motor to enable the device to be sleeved on the periphery of a target spot welding test piece, the device is further moved to the excitation module 2 and the magneto-optical sensor 3 which are respectively arranged on two sides of the welding point position of the target spot welding test piece, the stepping motor is used for driving the relative displacement between the first support 11 and the second support 12, namely the distance between the excitation module 2 and the magneto-optical sensor 3 is adjusted, and the excitation module 2 and the magneto-optical sensor 3 are enabled to be close to two opposite sides of the welding point.
After the position of the device is adjusted, the excitation module 2 is started, the excitation module 2 generates a multi-band excitation magnetic field, and the magneto-optical sensor 3 performs multi-band magneto-optical image acquisition on welding points and transmits the images to an upper computer; and the upper computer performs image fusion on the magneto-optical images of different frequency bands to obtain a defect image, and the shape and appearance of the spot welding defect can be visually displayed in the defect image, so that the quality detection of the welding spot is realized.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a spot welding solder joint quality detection device, its characterized in that includes installing support, excitation module, magneto-optical sensor, wherein, the installing support is U type installing support, the excitation module sets up the one end of installing support, magneto-optical sensor sets up the other end of installing support, magneto-optical sensor's output is connected with the input of external host computer.
2. The spot welding spot quality detection device according to claim 1, wherein the excitation module comprises an excitation control motor and an electromagnet, wherein an output end of the excitation control motor is electrically connected with an input end of the electromagnet.
3. The spot welding spot quality detection device according to claim 2, wherein the electromagnet comprises a direct current variable frequency electromagnet.
4. The spot welding spot quality detection device according to claim 2, wherein a rotary chassis is arranged inside one end of the mounting bracket, and the electromagnet is fixedly arranged on the rotary chassis.
5. The spot welding spot quality detection device according to claim 2, wherein the magneto-optical sensor is embedded in the other end of the mounting bracket, and a sensor window is formed in an inner side surface of the other end of the mounting bracket.
6. The spot welding spot quality detecting device according to claim 5, wherein a center of the sensor window is disposed coaxially with a center of the electromagnet.
7. The spot welding spot quality detection device according to any one of claims 1 to 6, wherein the mounting bracket comprises a first bracket and a second bracket, wherein the magneto-optical sensor is arranged at one end of the first bracket, and a through hole is formed at the other end of the first bracket; the excitation module is arranged at one end of the second support, and the other end of the second support is connected with the first support in a sliding mode through a through hole formed in the first support.
8. The spot welding quality detecting device according to claim 7, wherein a mounting member is provided on an outer side of the first bracket.
9. The spot weld quality inspection device of claim 8, wherein the mounting member comprises a clamp.
10. The spot welding spot quality detection device according to claim 7, wherein the device further comprises a stepping motor; a micro guide rail is arranged in a through hole formed in the first support along the relative displacement direction of the second support, and the second support is in sliding connection with the first support through the micro guide rail; the output end of the stepping motor is connected with the driving end of the miniature guide rail, and the stepping motor drives the second support to move on the miniature guide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021798520.9U CN212483454U (en) | 2020-08-25 | 2020-08-25 | Spot welding solder joint quality detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021798520.9U CN212483454U (en) | 2020-08-25 | 2020-08-25 | Spot welding solder joint quality detection device |
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| Publication Number | Publication Date |
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| CN212483454U true CN212483454U (en) | 2021-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021798520.9U Active CN212483454U (en) | 2020-08-25 | 2020-08-25 | Spot welding solder joint quality detection device |
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| CN (1) | CN212483454U (en) |
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- 2020-08-25 CN CN202021798520.9U patent/CN212483454U/en active Active
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