NO311174B1 - Procedure for checking joints between plastic parts - Google Patents
Procedure for checking joints between plastic parts Download PDFInfo
- Publication number
- NO311174B1 NO311174B1 NO19990480A NO990480A NO311174B1 NO 311174 B1 NO311174 B1 NO 311174B1 NO 19990480 A NO19990480 A NO 19990480A NO 990480 A NO990480 A NO 990480A NO 311174 B1 NO311174 B1 NO 311174B1
- Authority
- NO
- Norway
- Prior art keywords
- plastic parts
- heat radiation
- recorded
- welding
- temperature distribution
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 24
- 230000005855 radiation Effects 0.000 claims description 46
- 238000003466 welding Methods 0.000 claims description 44
- 238000009826 distribution Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 description 9
- 230000004927 fusion Effects 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 238000005304 joining Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 238000001454 recorded image Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000027758 ovulation cycle Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
- B29C65/2053—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position
- B29C65/2061—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position by sliding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/82—Testing the joint
- B29C65/8253—Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/82—Testing the joint
- B29C65/8261—Testing the joint by the use of thermal means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
- B29C66/5324—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length
- B29C66/53245—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow
- B29C66/53246—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers
- B29C66/53247—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers said spouts comprising flanges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
- B29C66/91216—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods enabling contactless temperature measurements, e.g. using a pyrometer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
- B29C66/967—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes
- B29C66/9672—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes involving special data inputs, e.g. involving barcodes, RFID tags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7172—Fuel tanks, jerry cans
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/737—Articles provided with holes, e.g. grids, sieves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/44—Resins; Plastics; Rubber; Leather
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Toxicology (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
Oppfinnelsen gjelder en fremgangsmåte for kontroll av en The invention relates to a method for controlling a
skjøt mellom plastdeler/-detaljer som føyes sammen ved press-sveising uten bruk av tilsatsmateriale. joint between plastic parts/details that are joined by pressure welding without the use of additive material.
Ved produksjon av gjenstander som tildannes ved sammenføying av plastdetaljer med ønsket utforming, benyttes det gjerne en eller annen form for sveising. Siden mange av de angjeldende plastgjenstander er beholdere eller tanker som senere skal romme væske, stilles det naturlig nok krav om at skjøten mellom plastdetaljene er tett etter sveisingen. Derfor er det vanlig at beholderne eller tankene etter sammenføyingen kon-trolleres ved hjelp av vakuum- eller overtrykktesting, slik at det kan påvises om skjøten mellom plastdetaljene er fullverdig eller ikke. Praksis viser imidlertid at slik kontroll av sveiseskjøter med vakuum- eller overtrykktesting er både tids- og kostnadskrevende. Likeledes forekommer det for mange tilfelle hvor kontrollen ikke er i stand til å påvise eventuelle utettheter i sveiseskjøten mellom plastdetaljene. Dermed løper produsenten den risiko at undermåls beholdere eller tanker blir brakt ut i markedet med de uønskede konsekvenser In the production of objects that are formed by joining together plastic details with the desired design, one or another form of welding is often used. Since many of the plastic objects in question are containers or tanks that will later hold liquid, there is naturally a requirement that the joint between the plastic parts is tight after welding. Therefore, it is common for the containers or tanks to be checked after joining by means of vacuum or overpressure testing, so that it can be demonstrated whether the joint between the plastic parts is complete or not. Practice shows, however, that this type of inspection of welding joints with vacuum or overpressure testing is both time- and cost-consuming. Likewise, there are too many cases where the inspection is not able to detect any leaks in the welding joint between the plastic parts. Thus, the manufacturer runs the risk that undersized containers or tanks are brought onto the market with the undesirable consequences
det medfører. it entails.
Teknikkens standpunkt er blant annet representert ved et avsnitt i "Composites Engineering Handbook", av P.K. Mallick som i utgangspunkt omhandler termiske bølger, samt U.S. patentskriftene nr. 4,532,404, 4,594,497, 4,877,940 og 5,674,415. The technique's position is represented, among other things, by a section in the "Composites Engineering Handbook", by P.K. Mallick, who basically deals with thermal waves, as well as U.S. Patent Nos. 4,532,404, 4,594,497, 4,877,940 and 5,674,415.
Denne kjente teknikk består i de typiske tilfelle av sammensveising av to metallplater ved buttsveising ifølge tradi-sjonelle smeltesveisemetoder ved hjelp av elektroder. Elek-trodene smeltes ned i fugen mellom de for sammensveising bestemte metallplater, slik at metallet i det dannede sveisebad etter sveisingen inngår i sveisen mellom de to sammensveiste metallplater, én på hver side av fugen. Kontrollprosedyren består ved kjent teknikk i registrering av temperaturfordelingen på tvers av sveisestrengen. På grunnlag av denne registrering styres så posisjon og fremføringshastighet for sveiseelektroden samt dennes matehastighet. In the typical case, this known technique consists of welding two metal plates together by butt welding according to traditional fusion welding methods using electrodes. The electrodes are melted into the joint between the metal plates intended for welding together, so that the metal in the weld pool formed after welding is included in the weld between the two metal plates welded together, one on each side of the joint. The control procedure consists, by known technique, in recording the temperature distribution across the welding string. On the basis of this registration, the position and advance speed of the welding electrode as well as its feed speed are then controlled.
Nærmere bestemt omhandler U.S. patentskrift nr. 4,532,404 et kontroll/styresystem som arbeider under sanntid og tjener til å kontrollere/styre forutbestemte driftsforhold ved en svei-semekanisme som er bevegelig langs en fuge mellom to metall-deler som skal sveises sammen. En avfølingsanordning for strålevarme er innrettet til å reagere på varmestrålings-energi som strømmer (stråler) ut fra de oppvarmede arbeids-stykkene av metall. Specifically, the U.S. patent document no. 4,532,404 a control/control system which works in real time and serves to control/control predetermined operating conditions by a welding mechanism which is movable along a joint between two metal parts to be welded together. A sensing device for radiant heat is designed to respond to radiant heat energy that flows (radiates) from the heated metal workpieces.
Både dette U.S. patentskrift og de tre øvrige, ovennevnte U.S. patentskrifter samt ovennevnte avsnitt fra "CompositesEngineering Handbook" omhandler sveisemetoder av et helt annet slag enn den foreliggende oppfinnelse vedrører, nemlig pressveising uten bruk av tilsatsmateriale, og som går ut på å kontrollere skjøter mellom plastdeler/-detaljer som føyes sammen ved slik pressveising. Both this U.S. patent document and the three other, above-mentioned U.S. patent documents as well as the above-mentioned section from the "CompositesEngineering Handbook" deal with welding methods of a completely different kind than the present invention relates to, namely pressure welding without the use of additive material, and which involves checking joints between plastic parts/details that are joined by such pressure welding.
Formålet med foreliggende oppfinnelse har således vært å skaffe til veie en fremgangsmåte for bruk ved kontroll av skjøter mellom plastdeler/-detaljer som føyes sammen ved hjelp av pressveising uten bruk av tilsatsmateriale, hvor ovennevnte bruk av vakuum og overtrykk er erstattet med bruk av termografi, slik at varmestråling fra et område omkring skjøten av plastdelene/-detaljene kan benyttes som hjelpe-middel til å fastslå om sveiseskjøten er tett eller ikke. Dermed blir kontrollen langt mer kostnadseffektiv og dessuten langt sikrere mot at utette skjøter feilaktig godkjennes som tette. Et ytterligere formål er at kontrollen skal kunne ut-føres på det tidspunkt av produksjonen som er mest hensikts-messig for angjeldende gjenstand, produksjonssted, sveiseut-styr, etc. Det enten være seg som en prekontroll basert på varmestråling etter oppvarming av plastdetaljene i et område omkring skjøten og fortrinnsvis før plastdetaljene føyes sammen, som en etterkontroll basert på varmestråling av restvarme under avkjøling av plastdetaljene i området omkring skjøten, eller som en etterkontroll etter avsluttet avkjøling av området omkring skjøten basert på varmestråling fra varme som er tilført etter avsluttet avkjøling. The purpose of the present invention has thus been to provide a method for use when checking joints between plastic parts/details that are joined together by pressure welding without the use of additive material, where the above-mentioned use of vacuum and overpressure has been replaced with the use of thermography, so that heat radiation from an area around the joint of the plastic parts/details can be used as an aid to determine whether the welding joint is tight or not. This makes the inspection far more cost-effective and, moreover, far more secure against leaky joints being mistakenly approved as sealed. A further purpose is that the control should be able to be carried out at the time of production that is most appropriate for the object in question, place of production, welding equipment, etc. Either as a pre-control based on heat radiation after heating the plastic parts in a area around the joint and preferably before the plastic parts are joined together, as a follow-up check based on heat radiation of residual heat during cooling of the plastic parts in the area around the joint, or as a follow-up check after the cooling of the area around the joint has been completed based on heat radiation from heat added after cooling has been completed.
Dette formål er realisert ved at man med utgangspunkt i en fremgangsmåte i overensstemmelse med den innledende del av det selvstendige patentkrav 1, i tillegg går frem i samsvar med den karakteriserende del i patentkrav 1. This purpose is realized by starting from a method in accordance with the introductory part of the independent patent claim 1, and also proceeding in accordance with the characterizing part in patent claim 1.
Fremgangsmåten er derved realisert på den måte at varmestråling fra de nevnte plastdetaljer i et område omkring skjøten registreres ved hjelp av minst ett kamera, f. eks. digitalt infrarødt kamera, og at den registrerte varmestråling sammenlignes med minst én referanseverdi ved hjelp av datamaskinutstyr, slik at det kan fastlegges om sammensmeltingen av de nevnte plastdetaljer i området omkring skjøten er fullverdig. The method is thereby realized in such a way that heat radiation from the aforementioned plastic details in an area around the joint is recorded using at least one camera, e.g. digital infrared camera, and that the recorded heat radiation is compared with at least one reference value using computer equipment, so that it can be determined whether the fusion of the aforementioned plastic details in the area around the joint is complete.
Andre fordelaktige trekk ved oppfinnelsen fremgår av de uselvstendige patentkrav. Other advantageous features of the invention appear from the independent patent claims.
Det vil i den etterfølgende del av beskrivelsen, og med henvisning til figursettet, bli redegjort for foretrukne ut-føringsformer av oppfinnelsen, hvor: Fig. la-d viser et skjematisk oppriss av en første utførings-form av oppfinnelsen hvor varmestråling i et område omkring skjøten av de nevnte plastdetaljer registreres ved hjelp av et digitalt infrarødt kamera, og hvor plastdetaljene varmes opp til rett temperatur for sammensmelting ved hjelp av et varmespeil, idet varmestrålingen registreres etter oppvarmingen og før sammenføyingen av plastdetaljene finner sted; Fig. 2 viser et skjematisk oppriss av en andre utføringsform av oppfinnelsen hvor varmestrålingen i området omkring skjøten registreres under avkjøling av plastdetaljene etter sammensmeltingen; og Fig. 3 viser et skjematisk oppriss av en tredje utføringsform av oppfinnelsen hvor varmestrålingen først registeres etter de nevnte plastdetaljer er avkjølt etter sammensmeltingen og ny varme for registreringen er tilført ved hjelp av minst én blitzlampe. Preferred embodiments of the invention will be explained in the subsequent part of the description, and with reference to the set of figures, where: Fig. la-d shows a schematic outline of a first embodiment of the invention where heat radiation in an area around the joint of the aforementioned plastic parts is recorded using a digital infrared camera, and where the plastic parts are heated to the right temperature for fusion using a heat mirror, the heat radiation being recorded after the heating and before the joining of the plastic parts takes place; Fig. 2 shows a schematic outline of a second embodiment of the invention where the heat radiation in the area around the joint is recorded during cooling of the plastic parts after the fusion; and Fig. 3 shows a schematic outline of a third embodiment of the invention where the heat radiation is first registered after the aforementioned plastic details have cooled after the fusion and new heat for the registration has been supplied by means of at least one flash lamp.
Foreliggende oppfinnelse gjelder en fremgangsmåte tilpasset for bruk under kontroll av en skjøt mellom plastdetaljer 1, 2 som sammenføyes ved hjelp av sveising. Kontrollen av sveise-skjøten gjøres på den måte at varmestråling fra plastdetaljene 1, 2 i området omkring skjøten registreres ved hjelp av minst ett kamera 3, f. eks. digitalt infrarødt kamera. Deretter overføres registreringen av varmestrålingen fra kameraet 3 til et ikke-vist datamaskinutstyr som er slik programmert at registreringen sammenlignes med minst én referanseverdi. Dermed kan datamaskinutstyret fastlegge om skjøten mellom plastdetaljene 1, 2 oppfyller kvalitetskravene som er stilt for en fullverdig sammensmelting av disse, slik at pro-duserte gjenstander med undermåls skjøter kan skilles ut. Nevnte referanseverdi kan enten utgjøres av et bilde av varmestråling som er tatt med et tilsvarende kamera 3, og med forhold under sveisingen som gir en fullverdig skjøt mellom plastdetaljene 1, 2, eller utgjøres av en forutbestemt temperaturfordeling i, eventuelt temperaturer på utvalgte steder av plastdetaljene 1, 2 til bestemte tidspunkt etter oppvarmingen. I sistnevnte tilfelle er datamaskinutstyret slik programmert at den reelle temperaturfordelingen i, eventuelt temperaturene på de utvalgte steder av plastdetaljene 1, 2 beregnes på grunnlag av den registrerte varmestråling. Videre er den nevnte forutbestemte temperaturfordeling i, eventuelt temperaturene på de utvalgte steder av plastdetaljer 1, 2 fremskaffet ved hjelp av beregninger som teoretisk vil gi en fullverdig skjøt etter sammensmeltingen. Nevnte beregninger vil også kunne danne grunnlag for eksperimentelle tester. The present invention relates to a method adapted for use under control of a joint between plastic details 1, 2 which are joined by means of welding. The inspection of the welding joint is done in such a way that heat radiation from the plastic details 1, 2 in the area around the joint is registered with the help of at least one camera 3, e.g. digital infrared camera. The recording of the heat radiation from the camera 3 is then transferred to a computer equipment not shown which is programmed in such a way that the recording is compared with at least one reference value. Thus, the computer equipment can determine whether the joint between the plastic parts 1, 2 meets the quality requirements set for a full fusion of these, so that produced objects with substandard joints can be distinguished. Said reference value can either be made up of an image of heat radiation taken with a corresponding camera 3, and with conditions during the welding that provide a full-fledged joint between the plastic parts 1, 2, or made up of a predetermined temperature distribution in, possibly temperatures at selected places of the plastic parts 1, 2 at specific times after the warm-up. In the latter case, the computer equipment is programmed in such a way that the real temperature distribution in, possibly the temperatures at the selected locations of the plastic details 1, 2 is calculated on the basis of the recorded heat radiation. Furthermore, the aforementioned predetermined temperature distribution in, possibly the temperatures at the selected locations of plastic details 1, 2 is obtained by means of calculations which will theoretically give a full-fledged joint after the fusion. Said calculations will also be able to form the basis for experimental tests.
Kontrollen av sveiseskjøten kan, slik det er nevnt innled-ningsvis, skje ved ulike tidspunkt, og typiske eksempel på dette blir, med henvisning til figurene, omtalt nærmere i det etterfølgende. I fig. la-d er det vist en første utførings- form av oppfinnelse hvor kontrollen er i form av en prekontroll hvor varmestråling fra plastdetaljene 1, 2, registreres etter oppvarmingen av disse og før sammenføyingen finner sted, slik at sveisebetingelsene i et område omkring skjøten kan sammenlignes med minst én ideell referanseverdi som gir fullverdig sammensmelting av plastdetaljene 1, 2 under sveisingen. Nevnte ideelle referanseverdi kan enten være i form av et tidligere registrert bilde av varmestråling fra tilsvarende plastdetaljer 1, 2 hvor oppvarmingen var i orden, eller i form av en forutbestemt (teoretisk) temperaturfordeling i, eventuelt forutbestemte temperaturer på utvalgte steder av plastdetaljene 1, 2. Varmestrålingen fra plastdetaljene 1, 2 registreres ved hjelp av minst ett digitalt infrarødt kamera 3. Kameraet 3 registrerer varmestrålingen som et bilde med ulike farger i overensstemmelse med respektive temperatur i plastdetaljene 1, 2. Den registrerte varmestråling overføres på høvelig vis fra kameraet 3 til datamaskinutstyret som er slik programmert at den registrerte varmestråling sammenlignes med den valgte referanseverdi, det være seg det tidligere registrert bilde, eller angjeldende forutbestemte temperaturf ordeling i, henholdsvis temperaturene på de utvalgte steder av plastdetaljene 1, 2. Når det sammenlignes med angjeldende forutbestemte temperatur, er datamaskinutstyret slik innrettet at den reelle temperaturfordelingen eller temperaturene på de utvalgte steder beregnes på grunnlag av den registrerte varmestråling. Normalt vil det være tilstrekkelig med én eneste registrering av varmestrålingen under prekon-trollen av plastdetaljene 1, 2, men dette er ikke til hinder for at det ved behov kan gjøres flere registreringer. Plastdetal jene 1, 2 kasseres, eller varmeparametere justeres og ny oppvarming finner sted, hvis datamaskinutstyret under sammen-ligningen avdekker at det er for stor forskjell mellom vedkommende registrering og respektive referanseverdi. I slike tilfelle vil datamaskinutstyret dessuten kunne programmeres for å varsle om prosessfeil, slik at produksjonsanlegget kan stoppes for nødvendige justeringer av prosessparametrene. Graden av prosesskontroll og tiltak etter registrering av eventuelle feil under sveisingen vil avhenge av produktet, produksjonslinjen, kundens behov, kvalitetssikringsystem, etc. The inspection of the welding joint can, as mentioned in the introduction, take place at various times, and typical examples of this are, with reference to the figures, discussed in more detail below. In fig. la-d, a first embodiment of the invention is shown where the control is in the form of a pre-control where heat radiation from the plastic details 1, 2 is recorded after the heating of these and before the joining takes place, so that the welding conditions in an area around the joint can be compared with at least one ideal reference value that provides full fusion of the plastic parts 1, 2 during welding. Said ideal reference value can either be in the form of a previously recorded image of heat radiation from corresponding plastic details 1, 2 where the heating was in order, or in the form of a predetermined (theoretical) temperature distribution in, possibly predetermined temperatures at selected locations of the plastic details 1, 2 The heat radiation from the plastic parts 1, 2 is recorded using at least one digital infrared camera 3. The camera 3 records the heat radiation as an image with different colors in accordance with the respective temperature in the plastic parts 1, 2. The recorded heat radiation is transferred appropriately from the camera 3 to the computer equipment which is programmed in such a way that the recorded heat radiation is compared with the selected reference value, be it the previously recorded image, or the relevant predetermined temperature distribution in, respectively the temperatures at the selected locations of the plastic details 1, 2. When it is compared with the relevant predetermined temperature, is computer u the device is arranged so that the real temperature distribution or temperatures at the selected locations are calculated on the basis of the recorded heat radiation. Normally, a single recording of the heat radiation during the pre-control of the plastic parts 1, 2 will be sufficient, but this does not prevent more recordings being made if necessary. The plastic parts 1, 2 are discarded, or the heating parameters are adjusted and new heating takes place, if the computer equipment during the comparison reveals that there is too great a difference between the registration in question and the respective reference value. In such cases, the computer equipment will also be able to be programmed to notify of process errors, so that the production plant can be stopped for necessary adjustments to the process parameters. The degree of process control and measures taken after recording any errors during welding will depend on the product, the production line, the customer's needs, the quality assurance system, etc.
Ellers viser fig. la-d ovennevnte prekontroll benyttet i forbindelse med påsveising av en påfyllingsstuss 2 på en bensintank 1 av plast, men det er selvfølgelig ingen ting i veien for at tilsvarende kan utføres for alle typer sveiser og de fleste produkt. Stussen 2 bringes til en posisjon over tanken 1 hjelp av f. eks. en industrirobot 5, hvoretter et såkalt varmespeil 4 føres inn mellom tanken 1 og stussen 2. Det neste som skjer, er at tanken 1, stussen 2 og varmespeilet 4 føres sammen, jf. fig. lb, og varme tilføres tanken 1 og stussen 2 inntil disse har oppnådd den nødvendige smeltetemperatur og det ønskelige smeltebad med hensyn til dybde, inn-trenging og areal. Det kan benyttes differensiert tilføring av varme i avhengighet av plastens spesifikke varmekapasitet og den masse som skal varmes opp, slik at rett temperatur oppnås samtidig i tanken 1 og stussen 2. Deretter fjernes varmespeilet før stussen 2 og/eller tanken 1 vendes til en stilling hvor varmestrålingen kan registreres ved hjelp av et digitalt infrarødt kamera 3, jf. fig. lc. Varmebildet av stussen 2 og tanken 1 kan registreres hver for seg, eller samtidig avhengig av hvordan delene ser ut. Det kan eventuelt brukes et ikke-vist speil for en og/eller begge delene, slik at det bare blir nødvendig med en begrenset eller ingen ven-ding av delen eller delene. Dersom den påfølgende sammenlig-ning av den registrerte varmestråling med vedkommende referanseverdi i datamaskinutstyret viser at tanken 1 og stussen Otherwise, fig. la-d above pre-check used in connection with welding on a filling nozzle 2 on a plastic petrol tank 1, but there is of course nothing to prevent the same being carried out for all types of welds and most products. The nozzle 2 is brought to a position above the tank 1 with the help of e.g. an industrial robot 5, after which a so-called heat mirror 4 is introduced between the tank 1 and the connection 2. The next thing that happens is that the tank 1, the connection 2 and the heating mirror 4 are brought together, cf. fig. lb, and heat is supplied to the tank 1 and the connection 2 until these have reached the required melting temperature and the desired melting bath with regard to depth, penetration and area. A differentiated supply of heat can be used depending on the specific heat capacity of the plastic and the mass to be heated, so that the correct temperature is achieved simultaneously in the tank 1 and the connection 2. The heating mirror is then removed before the connection 2 and/or the tank 1 is turned to a position where the heat radiation can be recorded using a digital infrared camera 3, cf. fig. lc. The thermal image of the connection 2 and the tank 1 can be recorded separately, or at the same time depending on how the parts look. A non-visible mirror can optionally be used for one and/or both parts, so that only a limited or no turning of the part or parts is necessary. If the subsequent comparison of the recorded heat radiation with the relevant reference value in the computer equipment shows that the tank 1 and the connection
2 har oppnådd tilsiktet temperatur etter oppvarmingen, føres 2 has reached the intended temperature after heating, is entered
stussen 2 mot tanken 1 ved hjelp av roboten 5, slik at sammensveisingen kan finne sted, jf. fig. Id. the spigot 2 against the tank 1 with the help of the robot 5, so that the welding can take place, cf. fig. Id.
Fig. 2 viser en annen utføringsform av oppfinnelsen hvor kontrollen av sveiseskjøten finner sted under avkjølingen av plastdetaljene 1, 2 etter sammensveisingen. Temperaturfordelingen under avkjølingen utvikles etter et helt bestemt mønster når oppvarmingen har vært i orden, samt plastdetaljene har fått riktig posisjon og kontakt ved sammensveisingen. Fig. 2 shows another embodiment of the invention where the inspection of the welding joint takes place during the cooling of the plastic parts 1, 2 after the welding. The temperature distribution during cooling develops according to a completely specific pattern when the heating has been in order, and the plastic parts have received the correct position and contact during welding.
i Nevnte spesielle utvikling av temperaturfordelingen under av-kjølingen vil dermed tillate at etterkontrollen av sveise-skjøten kan baseres på registrering av varmestråling fra restvarme fra plastdetaljene 1, 2 på det eller de ønskede i Mentioned special development of the temperature distribution during cooling will thus allow the post-check of the welding joint to be based on the registration of heat radiation from residual heat from the plastic parts 1, 2 on the desired
tidspunkt under avkjølingen. Videre kan den registrerte var- time during cooling. Furthermore, the registered person can
; mestråling bli sammenlignet med minst én bildereferanse som på respektive tidspunkt er avbildet av varmestrålingen fra tilsvarende plastdetaljer 1, 2 som hadde ideelle forhold under oppvarmingen og sammensveisingen for øvrig, eller bli ; meradiation be compared with at least one image reference which at the respective time is depicted by the heat radiation from corresponding plastic parts 1, 2 which had ideal conditions during the heating and welding otherwise, or be
sammenlignet med minst én referanseverdi av forutbestemte compared to at least one reference value of predetermined
i temperaturfordelinger i eller forutbestemte temperaturer i utvalgte steder av plastdetaljene 1, 2. I sistnevnte tilfelle er datamaskinutstyret slik innrettet at temperaturfordelingen eller temperaturene på de utvalgte steder beregnes på grunnlag av varmestrålingen som er registrert på respektive tids-i punkt under avkjølingen. in temperature distributions in or predetermined temperatures in selected locations of the plastic details 1, 2. In the latter case, the computer equipment is arranged such that the temperature distribution or temperatures in the selected locations are calculated on the basis of the heat radiation recorded at the respective time point during cooling.
Ellers viser fig. 2 den samme bensintank 1 og påfyllingsstuss 2 som er omtalt i fig. 1, men her er disse posisjonert og Otherwise, fig. 2 the same petrol tank 1 and filling nozzle 2 that are discussed in fig. 1, but here these are positioned and
sammensveist. Videre anbringes kameraet 3 over stussen, slik welded together. Furthermore, the camera 3 is placed over the stub, like this
at varmestråling fra restvarmen i tanken 1 og stussen 2 kan that heat radiation from the residual heat in tank 1 and connection 2 can
d registreres på angjeldende tidspunkt. For øvrig tilsvarer foreliggende utføringsform det som er nevnt i forbindelse med d is registered at the relevant time. Otherwise, the present embodiment corresponds to what is mentioned in connection with
omtalen av den førstnevnte utføringsform. the mention of the former embodiment.
Fig. 3 viser en tredje utføringsform av oppfinnelsen hvor kontrollen av sveiseskjøten først finner sted etter avkjøl-ingen av plastdetaljene 1, 2. Her gjøres kontrollen ved hjelp Fig. 3 shows a third embodiment of the invention where the inspection of the welding joint only takes place after the cooling of the plastic parts 1, 2. Here the inspection is done using
> av varme som tilføres de avkjølte plastdetaljene 1, 2 i området omkring sveiseskjøten. Varmen kan tilføres som en kort varme- eller lyspuls, f. eks. fra minst én blitzlampe 6. Den termiske energien på overflaten vil deretter diffundere inn i > of heat that is supplied to the cooled plastic parts 1, 2 in the area around the weld joint. The heat can be supplied as a short pulse of heat or light, e.g. from at least one flash lamp 6. The thermal energy on the surface will then diffuse into the
plastdetaljene 1, 2. Mulige feil i sveiseskjøten vil imidler-d tid hindre nevnte diffusjon. Resultatet av dette er at plastdetal jene 1, 2 på overflaten ved feilen i sveiseskjøten vil the plastic details 1, 2. Possible faults in the welding joint will, however, prevent the aforementioned diffusion. The result of this is that the plastic parts 1, 2 on the surface at the fault in the weld joint will
avkjøles langsommere og holdes lengre varme. Nevnte diffusjon av den tilførte varme etter avkjølingen vil dermed tillate at cools more slowly and is kept warm longer. Said diffusion of the added heat after the cooling will thus allow that
etterkontrollen av sveiseskjøten kan baseres på registrering the subsequent inspection of the weld joint can be based on registration
5av varmestråling fra varmen som er tilført plastdetaljene 1, 2. Videre vil den registrert varmestråling bli sammenlignet med minst én bildereferanse som er avbildet av varmestrålingen fra plastdetaljene 1, 2 som på tilsvarende måte er til-ført varme etter avkjølingen, og som var sammenføyet under o ideelle forhold under oppvarmingen og sammensveisingen for øvrig, eller bli sammenlignet med minst én referanseverdi av forutbestemte temperaturfordelinger i, eventuelt forutbestemte temperaturer i utvalgte steder av plastdetaljene 1, 2. 1 sistnevnte tilfelle er datamaskinutstyret slik innrettet at s temperaturfordelingen, eventuelt temperaturene på de utvalgte steder, beregnes på grunnlag av varmestrålingen som er registrert på det eller de respektive tidspunkt etter nevnte oppvarming. Denne type kontroll utføres fortrinnsvis etter at sveiseskjøten er utsatt for en passende mekanisk belastning. 5 of heat radiation from the heat that has been added to the plastic parts 1, 2. Furthermore, the recorded heat radiation will be compared with at least one image reference that is depicted by the heat radiation from the plastic parts 1, 2 that have similarly added heat after cooling, and which were joined during o ideal conditions during the heating and welding in general, or be compared with at least one reference value of predetermined temperature distributions in, possibly predetermined temperatures in selected places of the plastic parts 1, 2. 1 in the latter case, the computer equipment is arranged so that s the temperature distribution, possibly the temperatures of the selected places, is calculated on the basis of the heat radiation recorded at the respective time or times after said heating. This type of control is preferably carried out after the weld joint has been exposed to a suitable mechanical load.
o Ellers viser fig. 3 den samme bensintank 1 og påfyllingsstuss 2 som er omtalt i fig. 1, men her er disse avkjølt etter sam- o Otherwise, fig. 3 the same petrol tank 1 and filling nozzle 2 that are mentioned in fig. 1, but here these are cooled after con-
mensveisingen. Varme for oppvarming etter avkjølingen til-føres ved hjelp av to blitzlamper 6. Videre anbringes kameraet 3 ved stussen 2, slik at varmestråling fra varmen som the menstrual cycle. Heat for heating after cooling is supplied by means of two flash lamps 6. Furthermore, the camera 3 is placed at the connection 2, so that heat radiation from the heat which
tilføres tanken 1 og stussen 2 kan registreres på angjeldende tidspunkt. For øvrig tilsvarer foreliggende utføringsform det som er nevnt i forbindelse med omtalen av den førstnevnte ut-føringsform. is supplied to tank 1 and connection 2 can be registered at the relevant time. Otherwise, the present embodiment corresponds to what is mentioned in connection with the description of the first-mentioned embodiment.
Dermed er det ved hjelp av foreliggende oppfinnelse skaffet til veie en fremgangsmåte for kontroll av sveiseskjøter som er rask under bruk, og som kan utføres automatisk i en produksjonslinje uten særlig forsinkelser av produksjonen. Foreliggende fremgangsmåte er dessuten fleksibel på den måte at én eller flere av utføringsformene kan benyttes samtidig i avhengighet av hvordan plastdetaljene og/eller produksjonsut-styret, etc. er utformet. Dette betyr store kostnadsbespar-elser som følge av at tidsforbruket er kort, at eventuelle feil kan lukes ut tidlig i produksjonen og at sammensveiste gjenstander som er tatt i bruk, ikke må byttes ut på grunn av lekkasje i sveiseskjøten. Videre blir kontrollen svært nøy-aktig, det være seg om kontrollen skjer ved hjelp av bare én eller flere av utføringsformene samtidig. Thus, with the help of the present invention, a method for checking welding joints has been provided which is quick during use, and which can be carried out automatically in a production line without any particular delays in production. The present method is also flexible in that one or more of the embodiments can be used at the same time, depending on how the plastic details and/or production equipment, etc. are designed. This means major cost savings as a result of the time consumption is short, that any errors can be weeded out early in production and that welded objects that have been put into use do not have to be replaced due to leakage in the welding joint. Furthermore, the control becomes very precise, whether the control takes place using only one or more of the embodiments at the same time.
Claims (8)
Priority Applications (4)
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NO19990480A NO311174B1 (en) | 1999-02-02 | 1999-02-02 | Procedure for checking joints between plastic parts |
GB0000135A GB2346688A (en) | 1999-02-02 | 2000-01-06 | Checking of plastic details |
FR0000639A FR2789179A1 (en) | 1999-02-02 | 2000-01-19 | PROCESS FOR USE IN CHECKING DETAILS OF PLASTIC MATERIALS |
DE2000104049 DE10004049A1 (en) | 1999-02-02 | 2000-01-31 | Procedure for testing plastic objects |
Applications Claiming Priority (1)
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NO19990480A NO311174B1 (en) | 1999-02-02 | 1999-02-02 | Procedure for checking joints between plastic parts |
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NO990480D0 NO990480D0 (en) | 1999-02-02 |
NO990480L NO990480L (en) | 2000-08-03 |
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NO19990480A NO311174B1 (en) | 1999-02-02 | 1999-02-02 | Procedure for checking joints between plastic parts |
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FR (1) | FR2789179A1 (en) |
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DE102006027028A1 (en) * | 2006-06-09 | 2007-12-13 | Ise Intex Gmbh | Plastic shaped part production monitoring method, involves producing plastic shaped part in tool, and recording produced plastic shaped part by thermal image camera after removal of plastic shaped part from tool |
KR20100054783A (en) | 2007-07-04 | 2010-05-25 | 테르모센소리크 게엠베하 | Method for the automatic inspection of a welding seam using heat flow thermography |
DE102007031206B8 (en) * | 2007-07-04 | 2009-05-28 | Thermosensorik Gmbh | Method for automatic inspection of a weld |
RU2464551C2 (en) * | 2007-07-04 | 2012-10-20 | Термосенсорик Гмбх | Method for automated flaw detection of weld joint via thermography |
DE102008058187A1 (en) * | 2008-11-20 | 2010-06-10 | Benteler Automobiltechnik Gmbh | Method and device for non-destructive quality determination of a weld and a welding device |
DE102010020874B4 (en) | 2010-05-18 | 2014-04-03 | Dcg Systems, Inc. | Method for measuring time reduction during the thermographic examination of a component |
PL224744B1 (en) * | 2012-06-15 | 2017-01-31 | Akademia Górniczo Hutnicza Im Stanisława Staszica W Krakowie | Device for evaluation of the technical condition of the surface of the linkages made of rubber or plastic, and the evaluation method of the technical condition of the surface of linkages made of rubber or plastic |
DE102013003760A1 (en) | 2013-03-06 | 2014-09-11 | MTU Aero Engines AG | Method and device for quality evaluation of a component produced by means of a generative laser sintering and / or laser melting process |
DE102018214827A1 (en) * | 2018-08-31 | 2020-03-05 | Kautex Textron Gmbh & Co. Kg | Method for testing a connection of an installation part in a molded plastic part designed as a hollow body |
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US4410381A (en) * | 1982-01-26 | 1983-10-18 | Ford Motor Company | Methods and apparatus for testing the quality of an ultrasonic weld in thermoplastic material |
ATE28935T1 (en) * | 1982-03-18 | 1987-08-15 | Atomic Energy Authority Uk | THERMOGRAPHY OF BALANCING PROCEDURES. |
GB8921160D0 (en) * | 1989-09-19 | 1989-11-08 | Atomic Energy Authority Uk | Thermographic inspection |
US5111048A (en) * | 1990-09-27 | 1992-05-05 | General Electric Company | Apparatus and method for detecting fatigue cracks using infrared thermography |
US5240329A (en) * | 1992-08-14 | 1993-08-31 | Ford Motor Company | Non-destructive method for detecting defects in a workpiece |
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 |
JPH10100258A (en) * | 1996-09-26 | 1998-04-21 | Yasuo Nannichi | Apparatus for fusion weld of plastics |
DE19650883C2 (en) * | 1996-12-07 | 1999-09-23 | Saechsisches Textilforsch Inst | Process for non-contact and non-destructive testing of welds on moving webs |
DE19703484A1 (en) * | 1997-01-31 | 1998-08-06 | Img Inst Fuer Maschinen Antrie | Method of non-destructive testing of materials and composites for internal defects using thermography |
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GB2346688A (en) | 2000-08-16 |
NO990480L (en) | 2000-08-03 |
NO990480D0 (en) | 1999-02-02 |
FR2789179A1 (en) | 2000-08-04 |
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