埋弧焊論文：埋弧焊次電弧近似熵焊接參數(shù)

1、【中文摘要】在現(xiàn)代的工業(yè)生產(chǎn)中，焊接已經(jīng)被廣泛地應(yīng)用于各個領(lǐng)域。埋弧焊由于具有較高的生產(chǎn)效率，較好的焊接質(zhì)量和焊縫外觀,以及良好的操作環(huán)境，已經(jīng)成為應(yīng)用最為廣泛的焊接方法之一。前人把磁控技術(shù)應(yīng)用于CO2氣體保護焊，研制了磁控擺動電弧CO2氣體保護焊跟蹤系統(tǒng)。本文在對磁控擺動電弧CO2氣體保護焊跟蹤系統(tǒng)中磁控電弧傳感器的特性以及系統(tǒng)的穩(wěn)定性研究基礎(chǔ)上，進行了以下研究:1、分析磁場對埋弧焊的影響，并設(shè)計兩組實驗進行驗證；然后在前人研究基礎(chǔ)上，設(shè)計開發(fā)磁場驅(qū)動電弧裝置和橫向的交變磁場驅(qū)動電弧裝置,對勵磁電源、信號采集及信號處理系統(tǒng)進行了優(yōu)化設(shè)計。2、通過是否添加合金碎絲，對磁控電弧埋弧焊電弧擺動的穩(wěn)

2、定性進行研究。對添加合金碎絲和不含合金碎絲的二種焊縫進行了力學(xué)性能分析研究合金元素對焊縫性能的影響，從而得出合金碎絲對電弧穩(wěn)定性的影響規(guī)律。超聲波焊縫質(zhì)量檢測結(jié)果表明：合金碎絲能夠提高電弧擺動的穩(wěn)定性。3、前人采用統(tǒng)計分析方法分析了電弧穩(wěn)定的原因，并取得了一定的進展，但其實用性較差。本文在其基礎(chǔ)上從非線性的角度，采用近似熵的分析方法對磁控埋弧焊電弧穩(wěn)定性進行研究。根據(jù)不同電流、電壓以及焊接速度設(shè)計一系列實驗，計算各個參數(shù)的近似熵均值,探索磁控埋弧焊穩(wěn)定性與近似熵的聯(lián)系。本課題主要有兩個創(chuàng)新點:一是利用合金碎絲替代傳統(tǒng)的焊劑，引入了“次電弧”的概念；二是利用非線性近似熵來量化評價焊接參數(shù)對焊接穩(wěn)

3、定性的影響，對以后的研究具有一定的參考價值?！居⑽恼縄nthemodernindustrialproducton,weldinghasbeenwidelyusedinvariousfields.submergedarcweldinghasbecomethemostwidelyoneofweldingmethodsbecauseofitsthehigherproductionefficiency、betterthequalityofwelding、weldingseamappearaneeandgoodoperatingenvironment.Themagneticcontroltechno

4、logyhasbeenapplicationedinCO2shieldedwelding,ThesystemofmagnetronswingingarcCO2shieldedweldingtrackinghasbeendeveloped.TheresearchoncharacteristicsofmagnetronarcsensoraboutmagnetronswingingarcCO2shieldedweldingtrackingsystemandthestabilityofsystem,thefollowingwasresearched:1、Thepaperanalysistheinflu

5、enceofmagneticfieldtosubmergedarcweldingandsdesignedtwogroupsofcomparativeexperiments.Thenbasedonthepredecessor'sresearch,theauthordesignanddevelopmagneticdrivearcdeviceandlateralalternationmagneticfielddrivearcdevice,meanwhiletheauthormadeoptimizationdesigntoexcitationpowersupply,signalacquisit

6、ionandsignalprocessingsystem.2、ThestabilityofMagnetronsubmergedarcweldingswinghasbeenresearchedbyaddingornotthealloybrokenwire.themechanicalpropertiesoftheweldhasbeenanalyzedbyaddingorremovingalloybrokenwire,andsomeresearchhasbeendoneontheinflueneeofalloyingelementsonweldproperties.andthen,theinflue

7、neeofarestabilitybecauseofaddingalloybrokenwirewereobtained.Finally,wemadeuseofUltrasonictodetectthequalityofweld,andfoundoutthatalloybrokenwirecanimprovethestabilityofswingarc.3、Previouspeoplehaveusedthemethodofstatisticalanalysistoanalysisthereasonsofthearcstabilityandhavemadecertainprogress,butth

8、eeffectispoorer,theauthorusethemethodofapproximateentropytoresearchthearcstabilityofmagneticcontrolsubmergedarcwelding.Atthesametime,theauthordesignedaseriesofexperimentsaccordingtodifferentcurrent,voltageandweldingspeedcalculationapproximateentropymeanofeachparameterandexploredthestabilityofmagnetronsubmergedarcweldingandtheconnectionofapproximateentropy.Thistopichastwomaininnovationpoints:introducedtheconceptof“secondaryarc”,usedabrokenwirealloyreplacementoftraditionalflux.Theotherpointisusingnonlinearapproximateentropy