CN115351456A - Weld joint welding quality judgment method - Google Patents
Weld joint welding quality judgment method Download PDFInfo
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- CN115351456A CN115351456A CN202211024941.XA CN202211024941A CN115351456A CN 115351456 A CN115351456 A CN 115351456A CN 202211024941 A CN202211024941 A CN 202211024941A CN 115351456 A CN115351456 A CN 115351456A
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- 238000003466 welding Methods 0.000 title claims abstract description 197
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000015654 memory Effects 0.000 claims description 7
- 230000001960 triggered effect Effects 0.000 claims description 4
- 239000000047 product Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000002950 deficient Effects 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
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Abstract
The invention discloses a method for judging welding quality of a welding seam, which comprises the step S1 that a robot outputs standard welding time length (T) bh ) And an Arc Detect signal, wherein the Arc Detect signal indicates that the welding seam starts to Arc; s2, judging the state of the Arc Detect signal; when the state is ON, the timer starts to time; otherwise, outputting a welding missing signal, and starting an alarm signal by the robot; s3, judging whether the Arc Detect signal is in an OFF state or not; if yes, the timer stops timing; and calculating the actual welding time (T) of the arc starting welding sh ) (ii) a Otherwise, returning to execute the step S2; s4, actual welding time length (T) sh ) Duration of welding with standard (T) bh ) Carrying out comparison; if the actual welding duration (T) sh ) Greater than or equal to the standard welding time (T) bh ) The welding seam is qualified; otherwise, the welding seam is unqualified, and the robot starts an alarm signal. The invention is realized by setting the actual welding time length (T) sh ) Length of welding with standard (T) bh ) The comparison is carried out to judge whether the welding seam is in a faulty welding or a missing welding, so as to reflect the welding quality of the welding seam, and the operation is simpleHigh efficiency.
Description
Technical Field
The invention belongs to the technical field of welding manufacturing, and particularly relates to a method for judging welding quality of a welding seam.
Background
Most of the traditional welding manufacture is finished by depending on welders, and particularly, the welding manufacture mode is common in some non-assembly line discrete factories. However, in the actual welding process of the welding seam which is finished only manually, a welder usually adjusts the welding parameters of the welding seam by himself or herself due to the fact that the welding speed is increased, and does not comply with the welding process rules, so that the welding quality of the welding seam or the welding point is poor. After the partially welded finished product or semi-finished product with poor quality is found, the partially welded finished product or semi-finished product needs to be reworked in time, so that the production efficiency is greatly reduced; and the other part of the defective welding finished product or semi-finished product which is not discovered is hidden trouble for burying later-use equipment.
In order to improve the production efficiency, welding machines are generally adopted for welding. Because the welding machine does not have a parameter monitoring function, welding parameters are mainly checked one by one or randomly by field inspection personnel in the welding process so as to ensure the welding quality. However, the production work efficiency is low through the inspection of the inspection personnel, and the welding quality of all welding seams cannot be guaranteed due to certain delay.
In order to solve the above problems, it is an important technical problem to be solved by those skilled in the art to design a method for judging the welding quality of a weld joint.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a method for judging the welding quality of a welding seam.
The purpose of the invention is realized by the following technical scheme:
the method for judging the welding quality of the welding seam comprises
The method for judging the welding quality of the welding seam comprises
S1, outputting standard welding time (T) by the robot bh ) And an Arc Detect signal, wherein the Arc Detect signal indicates that the welding seam starts to Arc;
s2, judging the state of the Arc Detect signal; when the state is ON, the timer starts to time; otherwise, outputting a welding missing signal, and starting an alarm signal by the robot;
s3, judging whether the Arc Detect signal is in an OFF state; if the state is OFF, the timer stops timing; and calculating the arc starting welding duration which is the actual welding duration (T) sh ) (ii) a Otherwise, returning to execute the step S2;
s4, actual welding time length (T) sh ) Length of welding with standard (T) bh ) Carrying out comparison; if the actual welding duration (T) sh ) Greater than or equal to the standard welding time (T) bh ) The welding seam is qualified; otherwise, the welding seam is unqualified, and the robot starts an alarm signal.
Preferably, in step S2, the Arc Detect signal is triggered when the welding head of the robot contacts the welding seam, and the Arc Detect signal is in an ON state.
Preferably, in step S2, the Arc Detect signal is triggered when the welding head of the robot is disengaged from the welding bead, and the Arc Detect signal is in an OFF state.
Preferably, the standard welding time length (T) bh ) And storing by a memory, wherein the number of the memories is consistent with the number of the welding seams.
Preferably, the timer records the actual welding time (T) of each welding seam sh ) Stored in an arithmetic register.
Preferably, in step S4, when the bead welding is failed, a signal of "insufficient welding" is output, indicating that the bead welding time is insufficient.
Preferably, in steps S1 and S4, the standard welding time (T) bh ) Setting a fault tolerance range; if the actual welding duration (T) sh ) Not less than the standard welding time (T) bh ) 80%, outputting a welding qualified signal; otherwise "insufficient welding" will be output.
Preferably, before step S1, the robot outputs an Is Arc signal when starting the welding operation, and the welding operation Is started when the Is Arc signal Is in an ON state, and then step S1 Is executed; otherwise, the welding work is not started, and the welding work is finished.
Preferably, after step S4, when the robot finishes welding, an Arc End signal Is output, and the signal indicates that the state of the Is Arc signal Is OFF; and if the Arc End signal is not output in the running process of the robot, the welding program is not finished, and the step S4 is returned to.
The technical scheme of the invention has the advantages that:
the welding state of the welding seam is detected in real time by adopting a robot with a detection function in the welding process, the detection result is output in real time, and an alarm signal is sent out in time after a finished product or a semi-finished product with poor welding occurs, so that the defective product is effectively prevented from flowing into the market;
by setting the actual welding time length (T) sh ) And signQuasi-welding duration (T) bh ) Comparing, judging whether the welding seam is in a faulty welding or a missing welding, further reflecting the welding quality of the welding seam, and having simple and efficient operation;
standard welding duration (T) per weld bh ) The welding time length is stored in the corresponding storage, and the corresponding actual welding time length is stored in the arithmetic register, so that the welding time lengths of different welding lines are prevented from being mixed, and the accuracy of welding line judgment is improved.
Drawings
FIG. 1: the invention discloses a flow chart of a single welding seam welding quality judgment process.
Detailed Description
Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. The embodiments are merely exemplary for applying the technical solutions of the present invention, and any technical solution formed by replacing or converting the equivalent thereof falls within the scope of the present invention claimed.
In the description of the schemes, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.
As shown in FIG. 1, the present invention discloses a method for determining weld quality, which comprises
S1, outputting standard welding time (T) by a robot before arc starting of a welding seam bh ) And the Is Arc signal; wherein the standard welding time length (T) bh ) Stored by a memory, the number of the memories and welding seamsThe number of the strips is consistent; i.e. the standard welding duration for each weld is stored in each of said memories.
The Is Arc signal Is a signal point established in the robot and can be set as an RO signal in a PLC program; if the state of the IS Arc signal Is ON, the welding program Is started; if the status of the Is Arc signal Is not ON, it indicates that the welding procedure Is not started, and step S6 Is directly executed.
S2, an Arc striking phenomenon occurs in the welding process of the welding line, and when the welding line is struck, the robot outputs an Arc Detect signal to indicate that the welding line starts striking. If the Is Arc signal appears and the Arc Detect signal does not appear, the welding seam Is in a missing welding state, a 'missing welding' signal Is directly output to indicate that the welding Is unqualified, and the step S5 Is continuously executed. When an unqualified signal appears, the robot gives an alarm to inform workers that the welding quality of the welding line is unqualified, and the welding line is required to be reworked in time so as to prevent welding defective products from flowing into the market.
S3, judging the state of the Arc Detect signal; when the state is ON, the timer starts to count time, and when the state of the Arc Detect signal is OFF, the timer stops counting time. In the process, if the Arc Detect signal does not have an ON state, the Arc Detect signal indicates that the welding seam is in a missing welding state, a 'missing welding' signal is directly output to indicate that the welding is unqualified, and the step S5 is continuously executed. If the Arc Detect signal does not have the OFF state, the welding seam is still in the welding process, the timing is not finished, and the Arc starting welding time is continuously recorded. The timer records the duration of the arc striking weld, which is the actual weld duration (T) sh ) (ii) a The actual welding duration (T) of each welding line recorded by the timer sh ) Stored in an arithmetic register.
S4, actual welding time length (T) sh ) Duration of welding with standard (T) bh ) Carrying out comparison; if actual welding duration (T) sh ) Greater than or equal to the standard welding time (T) bh ) The welding seam is qualified; otherwise, the welding time of the welding seam is insufficient, and the welding seam is unqualified. To enlarge the standard welding time (T) bh ) Setting a fault tolerance range; if the actual welding time length (T) sh ) Not less than the standardDuration of welding (T) bh ) 80%, outputting a welding qualified signal; otherwise, outputting 'insufficient welding', indicating that the welding time of the welding seam is insufficient and the welding is unqualified; when the welding is insufficient, the robot is the same as the welding missing signal, an alarm is sent out to tell the staff that the welding quality of the welding line is unqualified, and the staff asks for rework treatment in time so as to prevent the welding defective products from flowing into the market.
And S5, after the Arc striking of the welding seam is finished, the robot outputs an Arc End signal to indicate that the welding program is finished. The Arc End signal can be regarded as a signal when the state of the Is Arc signal Is OFF. And if the Arc End signal is not output in the running process of the robot, which indicates that the welding program is not ended, returning to execute the step S3.
And S6, resetting the IS Arc signal, executing the step S1, and continuously judging the welding quality of the next welding line.
In addition, the number of the robots can be adjusted according to actual use requirements, and if a plurality of robots exist, each robot corresponds to an independent Is Arc signal to indicate that the robot Is in welding.
The invention has various embodiments, and all technical solutions formed by adopting equivalent transformation or equivalent transformation are within the protection scope of the invention.
Claims (9)
1. The method for judging the welding quality of the welding seam is characterized by comprising the following steps: comprises that
S1, outputting standard welding time (T) by the robot bh ) And an Arc Detect signal, wherein the Arc Detect signal indicates that the welding seam starts to Arc;
s2, judging the state of the Arc Detect signal; when the state is ON, the timer starts to time; otherwise, outputting a welding missing signal, and starting an alarm signal by the robot;
s3, judging whether the Arc Detect signal is in an OFF state or not; if the state is OFF, the timer stops timing; and calculating the arc starting welding duration which is the actual welding duration (T) sh ) (ii) a Otherwise, returning to execute the step S2;
s4, actual welding time length (T) sh ) Duration of welding with standard (T) bh ) Carrying out comparison; if the actual welding duration (T) sh ) Greater than or equal to the standard welding time (T) bh ) The welding seam is qualified; otherwise, the welding seam is unqualified, and the robot starts an alarm signal.
2. The weld joint welding quality judgment method according to claim 1, characterized in that: in the step S2, when a welding head of the robot is in contact with a welding seam, the Arc Detect signal is triggered, and meanwhile, the Arc Detect signal is in an ON state.
3. The weld joint welding quality judgment method according to claim 2, characterized in that: in step S2, when the welding head of the robot is disengaged from the weld, the Arc Detect signal is triggered, and the Arc Detect signal is in an OFF state.
4. The weld joint welding quality judgment method according to claim 3, characterized in that: the standard welding time length (T) bh ) And storing by a memory, wherein the number of the memories is consistent with the number of the welding seams.
5. The weld joint welding quality judgment method according to claim 4, characterized in that: actual welding duration (T) of each welding seam recorded by the timer sh ) Stored in an arithmetic register.
6. The weld joint welding quality judgment method according to claim 5, characterized in that: in step S4, when the welding seam is unqualified, a signal of insufficient welding is output, and the welding time of the welding seam is indicated to be insufficient.
7. The weld joint welding quality judgment method according to claim 6, characterized in that: in steps S1 and S4, the standard welding time (T) bh ) Setting a fault tolerance range; if the actual welding time length (T) sh ) Not less than the standard welding time (T) bh ) 80%, outputting a welding qualified signal; otherwise "insufficient welding" will be output.
8. The weld joint welding quality judgment method according to claim 7, characterized in that: before the step S1, outputting an Is Arc signal when the robot starts welding operation, wherein the welding operation Is started when the Is Arc signal Is in an ON state, and starting to execute the step S1; otherwise, the welding work is not started, and the welding work is finished.
9. The weld joint welding quality judgment method according to claim 8, characterized in that: after the step S4, outputting an Arc End signal when the robot finishes welding, wherein the signal represents that the state of the Is Arc signal Is OFF; and if the Arc End signal is not output in the running process of the robot, the welding program is not finished, and the step S4 is returned to.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211024941.XA CN115351456A (en) | 2022-08-25 | 2022-08-25 | Weld joint welding quality judgment method |
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| CN202211024941.XA CN115351456A (en) | 2022-08-25 | 2022-08-25 | Weld joint welding quality judgment method |
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|---|---|---|---|---|
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| CN112229976A (en) * | 2020-12-14 | 2021-01-15 | 快克智能装备股份有限公司 | Welding spot quality detection method |
| CN112404784A (en) * | 2020-11-04 | 2021-02-26 | 珠海泰坦新动力电子有限公司 | Welding quality detection method, device and system of welding machine and medium |
| CN112882996A (en) * | 2021-01-05 | 2021-06-01 | 唐山松下产业机器有限公司 | Welding data processing method, processing device and processing system |
| CN113887126A (en) * | 2021-09-07 | 2022-01-04 | 东风汽车集团股份有限公司 | Welding spot quality analysis method and device, terminal equipment and medium |
| CN114167189A (en) * | 2021-12-08 | 2022-03-11 | 华中科技大学鄂州工业技术研究院 | Welding defect detection method, electronic device and storage medium |
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2022
- 2022-08-25 CN CN202211024941.XA patent/CN115351456A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS58176085A (en) * | 1982-04-09 | 1983-10-15 | Dengensha Mfg Co Ltd | Method and device for controlling resistance welding machine |
| JPH106051A (en) * | 1996-06-18 | 1998-01-13 | Nissan Motor Co Ltd | Quality inspecting method in laser beam welding and its equipment |
| JP2006198674A (en) * | 2005-01-24 | 2006-08-03 | Toyota Motor Corp | Monitoring system and monitoring method for welding |
| KR100988509B1 (en) * | 2010-06-29 | 2010-10-18 | (주) 이더 | Apparatus for processing poor occurred during monitor of welding quality |
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