CN216620992U - Welding deformation real-time monitoring system - Google Patents
Welding deformation real-time monitoring system Download PDFInfo
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- CN216620992U CN216620992U CN202122278619.7U CN202122278619U CN216620992U CN 216620992 U CN216620992 U CN 216620992U CN 202122278619 U CN202122278619 U CN 202122278619U CN 216620992 U CN216620992 U CN 216620992U
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Abstract
The utility model relates to the field of automobile part processing, and discloses a welding deformation real-time monitoring system which comprises a monitoring circuit and a fixing unit, wherein the monitoring circuit is connected with the fixing unit; the monitoring circuit is provided with a mechanical sensing unit and a signal indicating unit, and the mechanical sensing unit is electrically connected with the signal indicating unit; before welding a workpiece, the mechanical induction unit is fixed at a measurement part of the workpiece through the fixing unit; when a workpiece is welded, the mechanical induction unit in a power-on state is stressed to generate a voltage change signal; the signal indicating unit generates an indicating signal according to the voltage change signal so as to indicate the stress deformation of the workpiece according to the indicating signal. The utility model can monitor the stress deformation of the workpiece in real time during welding and improve the welding precision of the workpiece.
Description
Technical Field
The utility model belongs to the field of automobile part processing, and particularly relates to a welding deformation real-time monitoring system.
Background
When automobile workpieces such as mule cars, tools and sample pieces are welded, stress deformation is easy to generate. These stress deformations greatly affect the welding accuracy of automotive workpieces. It is generally necessary to reduce the amount of deformation and improve the welding accuracy by adjusting the welding process or post-correction. However, effective monitoring of deformation in the welding process is still an industrial difficulty, so that the precision during welding is not easy to guarantee; and the later correction is time consuming and investment increasing.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a welding deformation real-time monitoring system, which is used for monitoring the stress deformation of a workpiece during welding in real time and improving the welding precision of the workpiece.
In order to achieve the purpose, the utility model adopts the technical scheme that: the welding deformation real-time monitoring system comprises a monitoring circuit and a fixing unit;
the monitoring circuit is provided with a mechanical sensing unit and a signal indicating unit, and the mechanical sensing unit is electrically connected with the signal indicating unit;
before welding a workpiece, the mechanical induction unit is fixed at a measurement part of the workpiece through the fixing unit;
when a workpiece is welded, the mechanical induction unit in a power-on state is stressed to generate a voltage change signal; the signal indicating unit generates an indicating signal according to the voltage change signal so as to indicate the stress deformation of the workpiece according to the indicating signal.
Optionally, the signal indication unit includes an operational amplifier, a balance adjuster and an indication device;
the operational amplifier is provided with a power supply first connecting end, a power supply second connecting end, a first input end, a second input end and an output end;
the output end is connected with the indicating device;
the first power supply connecting end and the second power supply connecting end are respectively connected with a power supply to form a power-on loop;
one end of the balance regulator is connected with the first power supply connection end, and the other end of the balance regulator is connected with the first input end;
one end of the mechanical induction unit is connected with the second connecting end of the power supply, and the other end of the mechanical induction unit is connected with the second input end.
Optionally, a balance resistor is disposed between the first input end and the second input end.
Optionally, the first connection end of the power supply is connected to the first end of the power supply through a first fuse;
the power second connection end pass through the second fuse with the second end of power is connected.
Optionally, the voltage change signal includes a first voltage signal and a second voltage signal, so as to indicate a trend direction of the stress deformation of the workpiece according to the first voltage signal and/or the second voltage signal;
when a first voltage at two ends of the balance regulator is greater than a second voltage at two ends of the mechanical induction unit, the output end outputs the first voltage signal;
when a first voltage at two ends of the balance regulator is smaller than a second voltage at two ends of the mechanical induction unit, the output end outputs a second voltage signal, and signs of the first voltage signal and the second voltage signal are opposite.
Optionally, the indicating device comprises a first light assembly and a second light assembly;
when the output end outputs the first voltage signal, the first light component sends out a first light signal;
and when the output end outputs the second voltage signal, the second light component sends out a second light signal.
Optionally, the first light signal is enhanced with an increase in an absolute value of the first voltage signal, and the second light signal is enhanced with an increase in an absolute value of the second voltage signal, so as to indicate the magnitude of the stress deformation of the workpiece according to the intensity of the first light signal and/or the second light signal.
Optionally, the balance adjuster is an adjustable resistor.
Optionally, the fixing unit is a flexible fixing unit;
the flexible fixing unit comprises an L-shaped combined support, the L-shaped combined support comprises a plurality of L-shaped supports, each L-shaped support is formed by splicing a first edge and a second edge, and the first edge and the second edge are both provided with long through holes;
the mechanical induction unit is fixed on the flexible fixing unit through a fastener arranged in the long through hole.
According to the utility model, the mechanical induction unit is used for measuring the deformation stress of the workpiece during welding, and the signal indication unit is used for outputting a corresponding indication signal, so that welding personnel or automatic welding equipment can adjust welding measures in time according to the indication signal, the stress deformation of the workpiece can be effectively reduced, and the welding precision is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a welding deformation real-time monitoring system according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a monitoring circuit according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an L-shaped combination bracket according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a mechanical sensing unit 01 assembled with a fastener according to an embodiment of the present invention;
FIG. 5 is a schematic view of a welding deformation real-time monitoring system for monitoring a workpiece according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating deformation correction during a welding process according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The welding deformation real-time monitoring system provided by the utility model is explained. As shown in fig. 1, the welding deformation real-time monitoring system includes a monitoring circuit and a fixing unit 03;
the monitoring circuit is provided with a mechanical sensing unit 01 and a signal indicating unit 02, and the mechanical sensing unit 01 is electrically connected with the signal indicating unit 02;
before welding a workpiece, the mechanical sensing unit 01 is fixed at a measuring part of the workpiece through the fixing unit 03;
when a workpiece is welded, the mechanical sensing unit 01 in a power-on state is stressed to generate a voltage change signal; the signal indicating unit 02 generates an indicating signal according to the voltage change signal to indicate the stress deformation of the workpiece according to the indicating signal.
Understandably, the welding deformation real-time monitoring system comprises a monitoring circuit and a fixing unit 03. The monitoring circuit is used for monitoring stress deformation generated during workpiece welding and generating an indication signal. The fixing unit 03 is used for fixing the mechanical sensing unit 01 in the monitoring circuit to a measurement position of the workpiece. Here, the workpiece may refer to a workpiece that is easily subjected to stress deformation during welding, such as an automobile workpiece used for manufacturing mule cars.
Specifically, the monitoring circuit is provided with a mechanical sensing unit 01 and a signal indicating unit 02. The mechanical sensing element 01 may be a force sensitive resistor. A force sensitive resistor is a special element that converts mechanical force into an electrical signal, and its resistance value changes with the magnitude of an applied force. The signal indicating unit 02 may trigger an indicating signal based on a resistance change of the mechanical sensing unit 01. The mechanical sensing unit 01 is electrically connected with the signal indicating unit 02, so that a voltage change signal generated when the resistance of the mechanical sensing unit 01 changes can be received by the signal indicating unit 02. Here, the mechanical sensing unit 01 is preferably a force sensitive resistor, and the pressure resistance of the force sensitive resistor is better. The sensing chip of a general pressure sensor is easily crushed.
Before welding a workpiece, the mechanical sensing unit 01 needs to be fixed to a measurement portion of the workpiece by using the fixing unit 03. The measurement site differs depending on the welding site of the workpiece. A plurality of measuring positions can be arranged on one workpiece, and each measuring position is provided with a mechanical induction unit 01. In order to ensure that the mechanical sensing unit 01 can accurately acquire the deformation pressure of the measurement portion, the mechanical sensing unit 01 needs to be fixed on the workpiece. In this case, the mechanical sensor unit 01 can be fixed to the workpiece by means of the fixing unit 03. That is, the mechanical sensing unit 01 is fixed to the fixing unit 03, and then the fixing unit 03 is fixed to the workpiece. The measuring position can be set according to actual welding requirements. In general, the measurement site may be disposed in the extending direction of the weld. For example, when frame welding is performed, the measurement site may be provided in the vicinity of the welding corner.
When welding a workpiece, the mechanical sensing unit 01 may be energized to be in an energized state. If the dynamic sensing unit 01 is not acted by force, the resistance of the dynamic sensing unit 01 is not changed, and at this time, the voltage at the two ends of the dynamic sensing unit 01 is kept stable. When the dynamic sensing unit 01 is acted by a force, the resistance of the dynamic sensing unit 01 changes, and at this time, the voltage at the two ends of the dynamic sensing unit 01 changes, so that a voltage change signal is formed. The signal indicating unit 02 may amplify the voltage variation signal and then transmit the amplified voltage variation signal to an indicating device, and output an indicating signal through the indicating device. Here, the indication signal can be set according to actual needs, such as a sound signal or a light signal. In some examples, the stress deformation of the workpiece may be indicated according to the strength of the indication signal.
The deformation stress of work piece when the welding is measured through mechanics induction element 01 to this embodiment to by the corresponding signal indication unit 02 output, welding personnel or automatic welding equipment can in time adjust the welding measure according to this signal indication, can effectively reduce the stress deformation of work piece, improve the welding precision.
Alternatively, as shown in fig. 2, the signal indicating unit 02 includes an operational amplifier 022, a balance regulator 021, and an indicating device;
the operational amplifier 022 is provided with a power supply first connection end, a power supply second connection end, a first input end, a second input end and an output end;
the output end is connected with an indicating device;
the first power supply connecting end and the second power supply connecting end are respectively connected with a power supply to form a power-on loop;
one end of the balance regulator 021 is connected with a first connecting end of the power supply, and the other end of the balance regulator 021 is connected with a first input end;
one end of the mechanical sensing unit 01 is connected with the second connecting end of the power supply, and the other end of the mechanical sensing unit is connected with the second input end.
Understandably, the signal indicating unit 02 includes an operational amplifier 022, a balance adjuster 021, and an indicating device. Among them, the operational amplifier 022 is a circuit unit having a high amplification factor. In the monitoring circuit, the operational amplifier 022 can receive the voltage variation signal of the mechanical sensing unit 01, compare the voltage variation signal with the voltage signal of the balance regulator 021, amplify and drive, and drive the indicating device to send out an indicating signal. The operational amplifier 022 is provided with a power supply first connection terminal, a power supply second connection terminal, a first input terminal (IN +), a second input terminal (IN-) and an output terminal (OUT). The first connection end of the power supply can be connected with the positive electrode (U +) of the power supply, and the second connection end of the power supply can be connected with the negative electrode (U-) of the power supply (or vice versa). The first input terminal may be the positive input terminal (IN +). The second input terminal may be a negative input terminal (IN-).
The balance adjuster 021 can adjust its own resistance value, and then change the voltage at both ends of the balance adjuster 021 to with the voltage adaptation at both ends of mechanics induction element 01. The balance regulator 021 may be disposed between the first connection terminal of the power supply (i.e., the positive electrode of the power supply) and the first input terminal. The mechanical sensing unit 01 may be disposed between the second connection terminal (i.e., the negative electrode of the power supply) of the power supply and the second input terminal.
The indicating means may be a light indicating means. The indicating means is connected to the output of the operational amplifier 022. The indicating device can generate corresponding indicating signals according to different signals output by the output end.
Optionally, as shown in fig. 2, a balance resistor 024 is disposed between the first input terminal and the second input terminal.
Understandably, a balancing resistor 024 may be disposed between the first input terminal and the second input terminal to balance a voltage difference between the first input terminal and the second input terminal.
Optionally, the balance adjuster 021 is an adjustable resistor.
Understandably, the balance adjuster 021 may be an adjustable resistor. When welding deformation monitoring is performed, the balance adjuster 021 can be adjusted so that the resistance value reaches a certain preset resistance value. Here, the preset resistance value may be set according to actual needs, for example, the resistance value of the mechanical sensing unit 01 under the condition of not receiving a force, or the resistance value of the mechanical sensing unit 01 under the condition of receiving an allowable stress.
In one example, an initial pressure is generated to the mechanical sensing unit 01 by adjusting the fixing unit 03 (i.e., the L-shaped combination bracket), and the signaling device outputs an indication signal (i.e., the lamp is turned on), and the balance adjuster 021 is adjusted to make the first input end and the second input end equal in voltage, and the signaling device does not output an indication signal (i.e., the lamp is turned off), so that the initialization of the signaling unit 02 is completed.
Optionally, the first connection end of the power supply is connected with the first end of the power supply through the first fuse 0251;
the second connection of the power supply is connected to the second terminal of the power supply through a second fuse 0252.
Understandably, if the voltage of the power supply is low, the fuse may not be provided. In one example, the power supply is at a voltage of 3V, and no fuse may be provided. If the voltage of the power supply is the mains supply voltage (alternating current can be converted into direct current according to actual needs), a fuse can be arranged to protect the monitoring circuit.
Specifically, the first terminal of the power source may be a positive terminal of the power source and the second terminal of the power source may be a negative terminal of the power source (or, the first terminal of the power source may be a negative terminal of the power source and the second terminal of the power source may be a positive terminal of the power source). The first fuse 0251 and the second fuse 0252 can protect the monitor circuit from a short circuit.
Optionally, the voltage change signal includes a first voltage signal and a second voltage signal, so as to indicate a trend direction of stress deformation of the workpiece 04 according to the first voltage signal and/or the second voltage signal;
when the first voltage at the two ends of the balance regulator 021 is greater than the second voltage at the two ends of the mechanical sensing unit 01, the output end outputs a first voltage signal;
when the first voltage at the two ends of the balance regulator 021 is less than the second voltage at the two ends of the mechanics induction unit 01, the output end outputs a second voltage signal, and the signs of the first voltage signal and the second voltage signal are opposite.
Understandably, the voltage change signal may include a first voltage signal and a second voltage signal. When the first voltage at the two ends of the balance regulator 021 is greater than the second voltage at the two ends of the mechanics induction unit 01, the output end outputs a first voltage signal, and the first voltage signal can be a positive voltage. When the first voltage at the two ends of the balance regulator 021 is less than the second voltage at the two ends of the mechanical sensing unit 01, the output end outputs a second voltage signal, and the second voltage signal can be a negative voltage. The signs of the first voltage signal and the second voltage signal are just opposite.
The direction of the tendency of the stress deformation of the workpiece 04 can be indicated from the first voltage signal and/or the second voltage signal. In general, the greater the absolute value of the first voltage signal and/or the second voltage signal, the greater the stress deformation of the workpiece 04.
Optionally, the indicating means comprises a first light assembly 0231 and a second light assembly 0232;
when the output end outputs the first voltage signal, the first lighting component 0231 sends out a first lighting signal;
when the output terminal outputs the second voltage signal, the second light module 0232 sends out a second light signal.
Understandably, the indicating device may include two sets of light components, a first light component 0231 and a second light component 0232, respectively. The light emitting parts of the first and second light assemblies 0231 and 0232 may be light emitting diodes. The first and second lamp components 0231 and 0232 are arranged in parallel, and the electrode connection order of the two is opposite. When the output of operational amplifier 022 is first voltage signal (positive voltage), the circuit of first light subassembly 0231 is connected, and first light subassembly 0231 sends first light signal, and the circuit of second light subassembly 0232 does not connect, and second light subassembly 0232 does not send second light signal. The first light signal may be red light. When the output of operational amplifier 022 exports the second voltage signal (negative voltage), the circuit of second light subassembly 0232 communicates, and second light subassembly 0232 sends the second light signal, and the circuit of first light subassembly 0231 does not communicate, and first light subassembly 0231 does not send the second light signal. The second light signal may be a yellow light.
Optionally, the first light signal is enhanced with an increase in the absolute value of the first voltage signal, and the second light signal is enhanced with an increase in the absolute value of the second voltage signal, so as to indicate the magnitude of the stress deformation of the workpiece 04 according to the intensity of the first light signal and/or the second light signal.
It is understood that the first lighting component 0231 can be provided with a plurality of light emitting diodes connected in parallel, each light emitting diode being connected in series with a zener diode. The breakdown voltages of the voltage stabilizing diodes connected in series with different light emitting diodes are different. Only when the first voltage signal output by the output terminal of the operational amplifier 022 is greater than the breakdown voltage of the zener diode, the light emitting diode connected in series with the zener diode emits light. For example, when the first voltage signal is +1V, only one light emitting diode is lit; when the first voltage signal is +2V, two light-emitting diodes are lightened; when the first voltage signal is +3V, three light emitting diodes are lighted. That is, the first lamp signal increases as the absolute value of the first voltage signal increases.
The second light module 0232 can adopt the same arrangement as the first light module 0231 and is not described in detail herein.
Optionally, the fixing unit 03 is a flexible fixing unit 03;
the flexible fixing unit 03 comprises an L-shaped combined support, the L-shaped combined support comprises a plurality of L-shaped supports 031, each L-shaped support 031 is formed by splicing a first edge and a second edge, and the first edge and the second edge are provided with long through holes;
the mechanical induction unit 01 is fixed on the flexible fixing unit 03 through a fastener arranged in the long through hole.
Understandably, the fixing unit 03 may be a flexible fixing unit 03. The flexible fixing unit 03 refers to a fixing structure which can adjust the fixing position of a fixed object (the mechanical sensing unit 01 in the present application) according to actual needs.
Here, the flexible fixing unit 03 may be an L-shaped composite stent. As shown in fig. 3, the L-shaped combination bracket includes a plurality of L-shaped brackets 031. The L-shaped bracket 031 is formed by splicing a first side and a second side. The first edge and the second edge are both provided with elongated through holes. In the example of fig. 3, two L-shaped stents 031 can be spliced into an L-shaped composite stent by connecting bolts 032.
As shown in fig. 4, fig. 4 is a schematic structural view illustrating the mechanical sensing unit 01 assembled with a fastener. The mechanical sensing unit 01 can be fixed on the flexible fixing unit 03 by a fastener 011 installed at the elongated through hole.
In some examples, as shown in fig. 5, a welding deformation real-time monitoring system may be provided on the workpiece 04 to acquire an indication signal generated by the signal indicating unit 02 when the workpiece 04 is welded. In some examples, the number of the signal indication units 02 may be multiple, such as the signal indication unit 02-1 and the signal indication unit 02-2.
The welding measure to be performed on the workpiece 04 is then determined on the basis of the indicator signal. After the welding measure to be performed is determined, the workpiece 04 is welded according to the welding measure. The welding measures to be performed can be set according to actual needs. Here, the welding measures to be performed include a deformation correcting measure and a non-deformation correcting measure. If the indication signal indicates that the workpiece 04 is subjected to a large deformation stress, deformation correction measures need to be taken to reduce stress deformation generated by the workpiece 04; if the indication signal indicates that the workpiece 04 does not generate stress deformation, non-deformation correction measures need to be taken. The non-deformation correction measure may be a welding measure that was originally set.
As shown in fig. 6, fig. 6 is a schematic diagram of deformation correction of an exemplary welding process. If the unilateral welding generates larger stress deformation, the deformation needs to be corrected by adopting a symmetrical welding mode.
The embodiment can monitor the stress deformation of the workpiece in real time during welding to generate an indication signal, and welding personnel or automatic welding equipment can adjust welding measures in time according to the indication signal, so that the stress deformation of the workpiece can be effectively reduced, and the welding precision is improved.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the utility model, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.
Claims (9)
1. A welding deformation real-time monitoring system is characterized by comprising a monitoring circuit and a fixing unit;
the monitoring circuit is provided with a mechanical sensing unit and a signal indicating unit, and the mechanical sensing unit is electrically connected with the signal indicating unit;
before welding a workpiece, the mechanical induction unit is fixed at a measurement part of the workpiece through the fixing unit;
when a workpiece is welded, the mechanical induction unit in a power-on state is stressed to generate a voltage change signal; the signal indicating unit generates an indicating signal according to the voltage change signal so as to indicate the stress deformation of the workpiece according to the indicating signal.
2. The welding deformation real-time monitoring system according to claim 1, wherein the signal indicating unit comprises an operational amplifier, a balance adjuster and an indicating device;
the operational amplifier is provided with a power supply first connecting end, a power supply second connecting end, a first input end, a second input end and an output end;
the output end is connected with the indicating device;
the first power supply connecting end and the second power supply connecting end are respectively connected with a power supply to form a power-on loop;
one end of the balance regulator is connected with the first power supply connection end, and the other end of the balance regulator is connected with the first input end;
one end of the mechanical induction unit is connected with the second connecting end of the power supply, and the other end of the mechanical induction unit is connected with the second input end.
3. The welding deformation real-time monitoring system according to claim 2, wherein a balance resistor is provided between the first input terminal and the second input terminal.
4. The welding deformation real-time monitoring system of claim 2, wherein the first connection end of the power supply is connected to the first end of the power supply through a first fuse;
the power second connection end pass through the second fuse with the second end of power is connected.
5. The welding deformation real-time monitoring system according to claim 2, wherein the voltage change signal comprises a first voltage signal and a second voltage signal to indicate a trend direction of the workpiece stress deformation according to the first voltage signal and/or the second voltage signal;
when a first voltage at two ends of the balance regulator is greater than a second voltage at two ends of the mechanical induction unit, the output end outputs the first voltage signal;
when a first voltage at two ends of the balance regulator is smaller than a second voltage at two ends of the mechanical induction unit, the output end outputs a second voltage signal, and signs of the first voltage signal and the second voltage signal are opposite.
6. The welding deformation real-time monitoring system of claim 5, wherein the indicating device comprises a first light assembly and a second light assembly;
when the output end outputs the first voltage signal, the first lamplight assembly sends out a first lamplight signal;
and when the output end outputs the second voltage signal, the second light component sends out a second light signal.
7. The system for real-time monitoring of weld deformation according to claim 6, wherein the first light signal is increased with an increase in the absolute value of the first voltage signal, and the second light signal is increased with an increase in the absolute value of the second voltage signal to indicate the magnitude of the stress deformation of the workpiece based on the intensity of the first light signal and/or the second light signal.
8. The welding deformation real-time monitoring system according to claim 2, wherein the balance adjuster is an adjustable resistor.
9. The welding deformation real-time monitoring system of claim 1, wherein the fixing unit is a flexible fixing unit;
the flexible fixing unit comprises an L-shaped combined support, the L-shaped combined support comprises a plurality of L-shaped supports, each L-shaped support is formed by splicing a first edge and a second edge, and the first edge and the second edge are both provided with long through holes;
the mechanical induction unit is fixed on the flexible fixing unit through a fastener arranged in the long through hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122278619.7U CN216620992U (en) | 2021-09-18 | 2021-09-18 | Welding deformation real-time monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122278619.7U CN216620992U (en) | 2021-09-18 | 2021-09-18 | Welding deformation real-time monitoring system |
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| CN216620992U true CN216620992U (en) | 2022-05-27 |
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