CA2208480A1 - Optical testing device for the on-line assessment of weldments or soldered joints - Google Patents
Optical testing device for the on-line assessment of weldments or soldered jointsInfo
- Publication number
- CA2208480A1 CA2208480A1 CA002208480A CA2208480A CA2208480A1 CA 2208480 A1 CA2208480 A1 CA 2208480A1 CA 002208480 A CA002208480 A CA 002208480A CA 2208480 A CA2208480 A CA 2208480A CA 2208480 A1 CA2208480 A1 CA 2208480A1
- Authority
- CA
- Canada
- Prior art keywords
- joint
- sensor
- unit
- testing device
- fault
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/127—Means for tracking lines during arc welding or cutting
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
- G01N21/95684—Patterns showing highly reflecting parts, e.g. metallic elements
Abstract
The invention relates to a testing device for the on-line assessment of parts (1, 2) connected to one another by weldment or soldering seams (3). By means of a guide unit (4 to 7) the parts (1, 2) connected to one another are retained at a constant distance from a sensor unit (8a, 8b) disposed on at least one side, but preferably on both sides of the parts (1, 2). The sensor units (8a, 8b) form part of a testing device also comprising an evaluating unit. At least one sensor unit (8a) comprises a joint-seeking unit (11), a bidimensional sensor (12) and a fault-detecting unit (13), and as a rule a threedimensional joint profile sensor (14). The bidimensional joint sensor, the fault-detecting unit (13) and the threedimensional joint profile sensor are positioned at the centre of the joint (3), in dependence on its position as determined by the joint-seeking unit (11). If a fault is detected by the bidimensional sensor (12) via the evaluating unit, a fault-detecting unit is activated which analyzes the location of the fault by the light-section procedure. The threedimensional joint profile sensor also operates by the light-section procedure in combination light beam triangulation. The measuring results thus obtained can be used for statistical process control (SPC) and/or for controlling the soldering and welding process and also the production installation.
Description
~. ' CA 02208480 1997-06-20 , . . .
_________________________________________________________________ OPTICAL TESTING DEVI~E FOR THE ON-LINE ASSESSMENT OF ~ELDMENTS OR
SOLDERED JO~N~S
_________________________________________________________________ In order to optimize their weight and strength, structural members are dimensioned in accordance with local loading.
Particularly in the motor car industry there has been a transition towards dimensioning individual structural members with different thicknesses, for example, dimensioning collapsi~le zones ~ore thinly than the passenger compartment. To ~eet these demands, structural members are used which consist of parts of different dimensions which are connected to one another via a joint, more particularly a weldment. To ena~l2 such structural members to perform their function during operation, the quality of the weldment is a decisive factor.
The usual method of checking a weldment is optical inspection by a skilled operative. It is self-evident that that method cannot ensure objective inspection using identical yardsticks. Optical fault detection ~y an operative is absolutely impossible when a structural member passes through a testing station at the very usual processing speed of, for example, 12 ~/min. Moreover, it is often difficult to distinguish a real ~ault from an apparent one by visual inspection. This may also be due to the different reflection properties of the surfaces of structural members, which may or may not have metallic coatings. Surface dirt and . ' CA 02208480 1997-06-20 annealing colours in the zone of the weldment make it difficult to distinguish between actual and merely apparent faults.
In a process which has just become known for joint measuring in the course of a joint follow-up system (DE 43 12 241 A1), the surface of a workpiece is illuminated in the zone of the joint and registered by an area-image recorder for grey-key image evaluation. The joint is also intermittently examined by the light-section procedure. Grey-key image evaluation is performed by the light-section procedure between the projection phases.
The object of that procedure is to locate the position of the weldment on the surface and not to assess its ~uality.
It is an object of the invention to provide a testing device for the weldments or soldered joints of parts connected to one another, which identifies and analyzes faults even with high rates of throughput.
This problem is solved by a testing device which has the following ~eatures:
a) The parts connected to one another are retained at a given distance from a sensor unit by means of a ~uide unit.
b) Information concerning the position of the joint is supplied by a joint-seeking unit having an optical sensor in whose measuring field the joint lies, and an evaluating unit connected to the sensor.
. ' CA 02208480 1997-06-20 c) In dependence on the information concerning the position of the joint, an optical bidimensional sensor whose measuring field is adapted to the width of the joint is so positioned by an adjusting member that the centre of the joint and the centre of the measuring field register, and d) in dependence on the bidimensional faults detected by the bidimensional sensorS a fault-detecting unit is activated which analyzes the location of the fault.
The testing device according to the invention brings those elements which are decisive for the geometrical and qualitative assessment of the joint into an optimum measuring position, so that surface faults and the width of the joint can be satisfactorily identified even at high rates of throughput. The result of the analysis can be displayed and recorded, for example, in the form of a report on the article tested, or else used for controlling the welding or soldering process.
More particularly the known light-section procedure has become established for analyzing the location of faults (German Journal:
"Kontrollel', September 1991, pages 5-14). However, if the sole objective is to determine the area over which the fault detected extends, it may be enough not to study the joint by the liaht-section procedure, but to make the joint recognizable to a suitable sensor by the use of suitable additional lighting.
Since the ~uality of a joint also depends, for example, on whether it has fallen or is too high, according to one feature '. ' CA 02208480 1997-06-20 of the invention the joint geometry is determined by means of a threedimensional joint profile sensor which operates by the light-section procedure and is based on the principle of light beam triangulation.
To obtain the optimum position for precise optical determination of the joint, according to a first feature of the invention in dependence on information concerning the position of the joint supplied by the joint-seeking unit with the optical sensor and the connected evaluating unit, an optical threedimensional joint profile sensor is so positioned by the adjusting member that the centre of the joint and the centre of the measuring field register.
Preferably an optical threedimensional joint profile sensor is disposed on each of the sides of the parts connected to one another.
For the precise optical determination of the joint width, a distinction must be made between the joint, smoke deposit and annealing colours of the metallic surfaces. To eliminate these interferences, according to one feature of the invention a structured area lightina, more particularly using infrared light, is used to illuminate the joint.
For the optical examination of a weldment or soldered joint it is as a rule not enough to examine the joint solely from one side of the parts connected to one another. Accordingly, according to another feature of the invention an optical bidimensional sensor ~ , CA 02208480 1997-06-20 .
and a fault-detecting unit are provided on each of the two sides of the parts connected to one another.
The invention will now be explained in greater detail with reference to an embodiment thereof illustrated in the drawings, which show:
Fig. 1 a testing device without evaluating unit for a weldment, viewed in the direction in which the joint runs, Fig. 2 the testing device shown in Fig. 1 shown diagrammatically without evaluating and guide units and viewed transversely of the direction in which the joint runs.
Fig. 3 a diagram illustrating the measuring principle of light beam triangulation, Fig. ~ a diagrammatic presentation of the light-section procedure used in conjunction with light beam triangulation, Fig. 5a a picture of a weldment supplied by a bidimensional sensor, and Fig. 5b the picture of a fault location, which a fault-detecting unit supplies an~ analyzes.
~eferring to Fig. 1, a structural member comprising two metal sheets 1, 2 of different thicknesses which are connected to one " ' CA 02208480 1997-06-20 another via a weldment 3 is positioned between rollers 4, 5, 6, 7 of a guide unit. The structural member 1, 2 can therefore be moved in the direction of the weldment 3. Disposed in rigid spatial relationship to the rollers 4 to 7 is a testing device which comprises an uppér sensor unit 8a and a lower sensor unit 8~. The weldment 3 and the adjoining zones are illuminated by a structured area lighting 9a, 9b more particularly using infrared light. The angle of incidence, wave length and the like of the lighting 9a, 9b are so selected that interferences, such as dirt, reflections and the like are substantially suppressed to the maximum extent for the picture to be taken.
As Fig. 2 shows, the upper testing device has a number of units 11, 12, 13, 14 disposed one after the other in the direction in which the weldment 3 runs. The weldment 3 is first scanned by a joint-seeking unit 11 having an optical sensor lla. Since the position o~ the weldment 3 may also be situated laterally offset in relation to the centre shown in Fig. 1, the joint-seeking unit 11 with its sensor lla must cover the whole range of possible positions of the joint 3. A connected evaluating unit (not shown) then analyzes where the ioint 3 is situated. The evaluating unit delivers an adjusting signal to an adjusting member 15. In accordance with the adjusting sianal, the adjusting member 15 so adjusts the sensor unit 8a-8b transversely of the direction in which the weldment 3 runs that the optical bidimensional sensor 12a can be serially followin~ sensors 13a, 14a of the following units 13, 14 are disposed centrally in relation to the weldment 3. The bidimensional sensor 12a then supplies pictures, as shown in Fig. 5a. The evaluating unit of ~ ' CA 02208480 1997-06-20 . , , the hidimensional sensor 12a analyzes the pictures for actual and apparent faults and also for joint width. However, this information concerning faults does not yet allow a distinction to be made between actual and apparent faults.
To enable apparent and actual faults to be distinguished fro~ one another, a fault-detecting unit 13 is connected to the bidimensional sensor 12. The fault-detecting unit 13 operates by the light-section procedure and has for this purpose an optical sensor 13a, more particularly a CCD matrix camera, a light beam projector 13b and an evaluating unit (not shown). Fig. 5b shows the picture ta~en by the optical sensor 13a.
Using the sensor unit 8a disclosed hereinbefore, therefore, it is possible to determine ~oint width and actual faults. ~ince in many cases this information is insufficient to enable the ~uality of a weldment to 'oe assessed, the aforementioned threedimensional ~oint pro~ile sensor 14 having a laser diode 14a and a CCD matrix camera 14b is connected to the fault-detecting unit 13. The threedimensional joint profile sensor 14a operates by the light-section procedure in conjunction with light beam trianaulation.
The principle of operation is illustrated in Figs. 3 and 4.
Since the optical assessment of the quality of a weldment 3 from only one side is inadequate, in the embodiment of the invention both sides of the weldment 3 are tested. For this purpose, however, not all the units described for one side must be provided. It is enough to have a further bidimensional sensor, a further fault-detecting unit and a further threedimensional weld ' CA 02208480 1997-06-20 .
profile sensor, since the information from the joint-seeking uni~
can be used for the adjustment o~ the sensor units on both sides.
The special advantages of the testing device according to the invention are that it enables the quality of a weldment or soldered joint to be determined non-destructively and on-line as regards joint faults, joint width and joint profile. The results obtained can be recorded and~or used to control the welding or soldering process and also the production installation. The invention can be used for dif~erent kinds of weldments and/or soldered ~oints in different metallic materials with and without metallic coatings, including in mixed constructions, and for weldments and soldered joints produced by different processes.
It can ~e used for both stationary and also moving structural components. The testing device according to the invention can be more particularly advantageously used in conjunction with a welding or soldering unit. If th~ sensor unit is coupled to the processing head, said unit is auto~atically guided along the weldment. In that case only the precise position of the joint need be determined via the joint-seeking unit for the adjust~ent of the actual sensor unit.
_________________________________________________________________ OPTICAL TESTING DEVI~E FOR THE ON-LINE ASSESSMENT OF ~ELDMENTS OR
SOLDERED JO~N~S
_________________________________________________________________ In order to optimize their weight and strength, structural members are dimensioned in accordance with local loading.
Particularly in the motor car industry there has been a transition towards dimensioning individual structural members with different thicknesses, for example, dimensioning collapsi~le zones ~ore thinly than the passenger compartment. To ~eet these demands, structural members are used which consist of parts of different dimensions which are connected to one another via a joint, more particularly a weldment. To ena~l2 such structural members to perform their function during operation, the quality of the weldment is a decisive factor.
The usual method of checking a weldment is optical inspection by a skilled operative. It is self-evident that that method cannot ensure objective inspection using identical yardsticks. Optical fault detection ~y an operative is absolutely impossible when a structural member passes through a testing station at the very usual processing speed of, for example, 12 ~/min. Moreover, it is often difficult to distinguish a real ~ault from an apparent one by visual inspection. This may also be due to the different reflection properties of the surfaces of structural members, which may or may not have metallic coatings. Surface dirt and . ' CA 02208480 1997-06-20 annealing colours in the zone of the weldment make it difficult to distinguish between actual and merely apparent faults.
In a process which has just become known for joint measuring in the course of a joint follow-up system (DE 43 12 241 A1), the surface of a workpiece is illuminated in the zone of the joint and registered by an area-image recorder for grey-key image evaluation. The joint is also intermittently examined by the light-section procedure. Grey-key image evaluation is performed by the light-section procedure between the projection phases.
The object of that procedure is to locate the position of the weldment on the surface and not to assess its ~uality.
It is an object of the invention to provide a testing device for the weldments or soldered joints of parts connected to one another, which identifies and analyzes faults even with high rates of throughput.
This problem is solved by a testing device which has the following ~eatures:
a) The parts connected to one another are retained at a given distance from a sensor unit by means of a ~uide unit.
b) Information concerning the position of the joint is supplied by a joint-seeking unit having an optical sensor in whose measuring field the joint lies, and an evaluating unit connected to the sensor.
. ' CA 02208480 1997-06-20 c) In dependence on the information concerning the position of the joint, an optical bidimensional sensor whose measuring field is adapted to the width of the joint is so positioned by an adjusting member that the centre of the joint and the centre of the measuring field register, and d) in dependence on the bidimensional faults detected by the bidimensional sensorS a fault-detecting unit is activated which analyzes the location of the fault.
The testing device according to the invention brings those elements which are decisive for the geometrical and qualitative assessment of the joint into an optimum measuring position, so that surface faults and the width of the joint can be satisfactorily identified even at high rates of throughput. The result of the analysis can be displayed and recorded, for example, in the form of a report on the article tested, or else used for controlling the welding or soldering process.
More particularly the known light-section procedure has become established for analyzing the location of faults (German Journal:
"Kontrollel', September 1991, pages 5-14). However, if the sole objective is to determine the area over which the fault detected extends, it may be enough not to study the joint by the liaht-section procedure, but to make the joint recognizable to a suitable sensor by the use of suitable additional lighting.
Since the ~uality of a joint also depends, for example, on whether it has fallen or is too high, according to one feature '. ' CA 02208480 1997-06-20 of the invention the joint geometry is determined by means of a threedimensional joint profile sensor which operates by the light-section procedure and is based on the principle of light beam triangulation.
To obtain the optimum position for precise optical determination of the joint, according to a first feature of the invention in dependence on information concerning the position of the joint supplied by the joint-seeking unit with the optical sensor and the connected evaluating unit, an optical threedimensional joint profile sensor is so positioned by the adjusting member that the centre of the joint and the centre of the measuring field register.
Preferably an optical threedimensional joint profile sensor is disposed on each of the sides of the parts connected to one another.
For the precise optical determination of the joint width, a distinction must be made between the joint, smoke deposit and annealing colours of the metallic surfaces. To eliminate these interferences, according to one feature of the invention a structured area lightina, more particularly using infrared light, is used to illuminate the joint.
For the optical examination of a weldment or soldered joint it is as a rule not enough to examine the joint solely from one side of the parts connected to one another. Accordingly, according to another feature of the invention an optical bidimensional sensor ~ , CA 02208480 1997-06-20 .
and a fault-detecting unit are provided on each of the two sides of the parts connected to one another.
The invention will now be explained in greater detail with reference to an embodiment thereof illustrated in the drawings, which show:
Fig. 1 a testing device without evaluating unit for a weldment, viewed in the direction in which the joint runs, Fig. 2 the testing device shown in Fig. 1 shown diagrammatically without evaluating and guide units and viewed transversely of the direction in which the joint runs.
Fig. 3 a diagram illustrating the measuring principle of light beam triangulation, Fig. ~ a diagrammatic presentation of the light-section procedure used in conjunction with light beam triangulation, Fig. 5a a picture of a weldment supplied by a bidimensional sensor, and Fig. 5b the picture of a fault location, which a fault-detecting unit supplies an~ analyzes.
~eferring to Fig. 1, a structural member comprising two metal sheets 1, 2 of different thicknesses which are connected to one " ' CA 02208480 1997-06-20 another via a weldment 3 is positioned between rollers 4, 5, 6, 7 of a guide unit. The structural member 1, 2 can therefore be moved in the direction of the weldment 3. Disposed in rigid spatial relationship to the rollers 4 to 7 is a testing device which comprises an uppér sensor unit 8a and a lower sensor unit 8~. The weldment 3 and the adjoining zones are illuminated by a structured area lighting 9a, 9b more particularly using infrared light. The angle of incidence, wave length and the like of the lighting 9a, 9b are so selected that interferences, such as dirt, reflections and the like are substantially suppressed to the maximum extent for the picture to be taken.
As Fig. 2 shows, the upper testing device has a number of units 11, 12, 13, 14 disposed one after the other in the direction in which the weldment 3 runs. The weldment 3 is first scanned by a joint-seeking unit 11 having an optical sensor lla. Since the position o~ the weldment 3 may also be situated laterally offset in relation to the centre shown in Fig. 1, the joint-seeking unit 11 with its sensor lla must cover the whole range of possible positions of the joint 3. A connected evaluating unit (not shown) then analyzes where the ioint 3 is situated. The evaluating unit delivers an adjusting signal to an adjusting member 15. In accordance with the adjusting sianal, the adjusting member 15 so adjusts the sensor unit 8a-8b transversely of the direction in which the weldment 3 runs that the optical bidimensional sensor 12a can be serially followin~ sensors 13a, 14a of the following units 13, 14 are disposed centrally in relation to the weldment 3. The bidimensional sensor 12a then supplies pictures, as shown in Fig. 5a. The evaluating unit of ~ ' CA 02208480 1997-06-20 . , , the hidimensional sensor 12a analyzes the pictures for actual and apparent faults and also for joint width. However, this information concerning faults does not yet allow a distinction to be made between actual and apparent faults.
To enable apparent and actual faults to be distinguished fro~ one another, a fault-detecting unit 13 is connected to the bidimensional sensor 12. The fault-detecting unit 13 operates by the light-section procedure and has for this purpose an optical sensor 13a, more particularly a CCD matrix camera, a light beam projector 13b and an evaluating unit (not shown). Fig. 5b shows the picture ta~en by the optical sensor 13a.
Using the sensor unit 8a disclosed hereinbefore, therefore, it is possible to determine ~oint width and actual faults. ~ince in many cases this information is insufficient to enable the ~uality of a weldment to 'oe assessed, the aforementioned threedimensional ~oint pro~ile sensor 14 having a laser diode 14a and a CCD matrix camera 14b is connected to the fault-detecting unit 13. The threedimensional joint profile sensor 14a operates by the light-section procedure in conjunction with light beam trianaulation.
The principle of operation is illustrated in Figs. 3 and 4.
Since the optical assessment of the quality of a weldment 3 from only one side is inadequate, in the embodiment of the invention both sides of the weldment 3 are tested. For this purpose, however, not all the units described for one side must be provided. It is enough to have a further bidimensional sensor, a further fault-detecting unit and a further threedimensional weld ' CA 02208480 1997-06-20 .
profile sensor, since the information from the joint-seeking uni~
can be used for the adjustment o~ the sensor units on both sides.
The special advantages of the testing device according to the invention are that it enables the quality of a weldment or soldered joint to be determined non-destructively and on-line as regards joint faults, joint width and joint profile. The results obtained can be recorded and~or used to control the welding or soldering process and also the production installation. The invention can be used for dif~erent kinds of weldments and/or soldered ~oints in different metallic materials with and without metallic coatings, including in mixed constructions, and for weldments and soldered joints produced by different processes.
It can ~e used for both stationary and also moving structural components. The testing device according to the invention can be more particularly advantageously used in conjunction with a welding or soldering unit. If th~ sensor unit is coupled to the processing head, said unit is auto~atically guided along the weldment. In that case only the precise position of the joint need be determined via the joint-seeking unit for the adjust~ent of the actual sensor unit.
Claims (6)
1. A testing device for weldments or soldering joints of parts, more particularly metal sheets, connected to one another, having the following features:
a) The parts (1, 2) connected to one another are retained at a given distance from a sensor unit (8a, 8b) by means of a guide unit (4, 5, 6, 7).
b) Information concerning the position of the joint (3) is supplied by a joint-seeking unit (11) having an optical sensor in whose measuring field the joint (3) lies, and an evaluating unit connected to the sensor (11a).
c) In dependence on the information concerning the position of the joint (3), an optical bidimensional sensor (12) whose measuring field is adapted to the width of the joint (3) is so positioned by an adjusting member (15) that the centre of the joint and the centre of the measuring field register, and d) in dependence on the bidimensional faults detected by the bidimensional sensor (12), a fault-detecting unit (13) is activated which analyzes the location of the fault.
a) The parts (1, 2) connected to one another are retained at a given distance from a sensor unit (8a, 8b) by means of a guide unit (4, 5, 6, 7).
b) Information concerning the position of the joint (3) is supplied by a joint-seeking unit (11) having an optical sensor in whose measuring field the joint (3) lies, and an evaluating unit connected to the sensor (11a).
c) In dependence on the information concerning the position of the joint (3), an optical bidimensional sensor (12) whose measuring field is adapted to the width of the joint (3) is so positioned by an adjusting member (15) that the centre of the joint and the centre of the measuring field register, and d) in dependence on the bidimensional faults detected by the bidimensional sensor (12), a fault-detecting unit (13) is activated which analyzes the location of the fault.
2. A testing device according to claim 1, characterized in that in dependence on information concerning the position of the joint (3) supplied by the joint-seeking unit (11) with the optical sensor (11a) and the connected evaluating unit, an optical three-dimensional joint profile sensor (14) is so positioned by the adjusting member (15) that the centre of the joint and the centre of the measuring field register.
3. A testing device according to claim 2, characterized in that the optical threedimensional joint profile sensor (14) operates by the light-section procedure in conjunction with light beam triangulation.
4. A testing device according to claims 1 or 2, characterized in that a structured area lighting (9a, 9b) is used to illuminate the joint (3).
5. A testing device according to claim 1, characterized in that an optical bidimensional sensor (12) and a fault-detecting unit (13) are provided on each of the two sides of the parts (1, 2) connected to one another.
6. A testing device according to claim 2, characterized in that an optical threedimensional joint profile sensor (14) is disposed on each of the sides of the parts (1, 2) connected to one another.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19505832.1 | 1995-02-21 | ||
| DE19505832A DE19505832C2 (en) | 1995-02-21 | 1995-02-21 | Optical test facility for online evaluation of welds or soldered seams |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2208480A1 true CA2208480A1 (en) | 1996-08-29 |
Family
ID=7754544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002208480A Abandoned CA2208480A1 (en) | 1995-02-21 | 1996-01-25 | Optical testing device for the on-line assessment of weldments or soldered joints |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0810912B1 (en) |
| JP (1) | JPH11500225A (en) |
| KR (1) | KR980700149A (en) |
| AU (1) | AU4714096A (en) |
| CA (1) | CA2208480A1 (en) |
| CZ (1) | CZ194397A3 (en) |
| DE (2) | DE19505832C2 (en) |
| ES (1) | ES2126385T3 (en) |
| FI (1) | FI972672A (en) |
| NO (1) | NO972870L (en) |
| WO (1) | WO1996026033A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19837084B4 (en) * | 1998-08-17 | 2009-10-08 | Volkswagen Ag | Method for optically detecting welds between a wheel disc and a wheel rim of a motor vehicle wheel |
| WO2006128317A1 (en) * | 2005-06-03 | 2006-12-07 | Elpatronic Ag | Method for illumination, and illumination arrangement |
| DE102007024789B3 (en) | 2007-05-26 | 2008-10-23 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Method for detecting defects in a weld during a laser welding process |
| DE102011104550B4 (en) | 2011-06-17 | 2014-04-30 | Precitec Kg | Optical measuring device for monitoring a joint seam, joining head and laser welding head with the same |
| KR101532694B1 (en) * | 2013-12-24 | 2015-06-30 | 주식회사 포스코 | Apparatus and method for detecing welding defect by tension |
| CN109297970B (en) * | 2017-11-24 | 2021-02-12 | 苏州娄格自动化科技有限公司 | Solar panel junction box weld scar detection assembly |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60121072A (en) * | 1983-12-05 | 1985-06-28 | Hitachi Zosen Corp | Welding condition monitoring device |
| JPS61293657A (en) * | 1985-06-21 | 1986-12-24 | Matsushita Electric Works Ltd | Method for inspecting soldering appearance |
| SE454334B (en) * | 1986-09-01 | 1988-04-25 | Asea Ab | DEVICE BY INDUSTRIROBOT |
| DE4311320A1 (en) * | 1993-04-06 | 1994-10-13 | Branson Ultraschall | Method and device for checking the weld seam quality in the joining of plastics parts |
| DE4312241A1 (en) * | 1993-04-15 | 1994-10-20 | Deutsche Aerospace | Method for measuring welds (seams, welded seams) |
-
1995
- 1995-02-21 DE DE19505832A patent/DE19505832C2/en not_active Expired - Fee Related
-
1996
- 1996-01-25 ES ES96902921T patent/ES2126385T3/en not_active Expired - Lifetime
- 1996-01-25 WO PCT/EP1996/000301 patent/WO1996026033A1/en not_active Application Discontinuation
- 1996-01-25 CZ CZ971943A patent/CZ194397A3/en unknown
- 1996-01-25 KR KR1019970704190A patent/KR980700149A/en not_active Application Discontinuation
- 1996-01-25 AU AU47140/96A patent/AU4714096A/en not_active Abandoned
- 1996-01-25 EP EP96902921A patent/EP0810912B1/en not_active Expired - Lifetime
- 1996-01-25 DE DE59600711T patent/DE59600711D1/en not_active Expired - Fee Related
- 1996-01-25 JP JP8525333A patent/JPH11500225A/en active Pending
- 1996-01-25 CA CA002208480A patent/CA2208480A1/en not_active Abandoned
-
1997
- 1997-06-19 FI FI972672A patent/FI972672A/en unknown
- 1997-06-20 NO NO972870A patent/NO972870L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI972672A0 (en) | 1997-06-19 |
| FI972672A (en) | 1997-06-19 |
| AU4714096A (en) | 1996-09-11 |
| EP0810912B1 (en) | 1998-10-21 |
| CZ194397A3 (en) | 1998-07-15 |
| NO972870L (en) | 1997-08-13 |
| NO972870D0 (en) | 1997-06-20 |
| KR980700149A (en) | 1998-03-30 |
| WO1996026033A1 (en) | 1996-08-29 |
| DE59600711D1 (en) | 1998-11-26 |
| ES2126385T3 (en) | 1999-03-16 |
| DE19505832C2 (en) | 1996-12-05 |
| EP0810912A1 (en) | 1997-12-10 |
| DE19505832A1 (en) | 1996-08-22 |
| JPH11500225A (en) | 1999-01-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |