聲信號(hào)輔助同軸視覺激光模具修復(fù)飛濺控制
發(fā)布時(shí)間:2019-03-16 12:37
【摘要】:在模具表面激光強(qiáng)化過程中,當(dāng)單位材料激光能量達(dá)到一定值時(shí),微小的離焦量波動(dòng)就會(huì)導(dǎo)致飛濺缺陷的產(chǎn)生,對(duì)模具表面強(qiáng)化質(zhì)量有較大的影響.利用CCD同軸視覺對(duì)激光強(qiáng)化的過程進(jìn)行實(shí)時(shí)采集并處理,提取焊道寬度信息,作為電流一定情況下飛濺產(chǎn)生的一個(gè)特征量.但僅僅依靠視覺圖像不能夠保證檢測(cè)的準(zhǔn)確性,而聲信號(hào)強(qiáng)度與激光能量有直接的關(guān)系,通過試驗(yàn)驗(yàn)證了這種關(guān)系.探索了聲信號(hào)的均方根與飛濺產(chǎn)生的關(guān)系.通過聲信號(hào)輔助同軸視覺對(duì)焊接過程的監(jiān)測(cè),通過不同的方面對(duì)激光模具修復(fù)飛濺的檢測(cè),極大的提高了飛濺檢測(cè)的準(zhǔn)確性.
[Abstract]:In the process of laser strengthening of die surface, when the laser energy per unit material reaches a certain value, the slight fluctuation of defocus will lead to spatter defect, which has a great influence on the surface strengthening quality of die. CCD coaxial vision is used to collect and process the laser hardening process in real-time. The width information of weld bead is extracted as a characteristic of spatter under certain current condition. However, the accuracy of the detection can not be guaranteed by the visual image alone, and the relationship between the intensity of acoustic signal and laser energy is directly related, which is verified by experiments. The relationship between root mean square (RMS) of acoustic signal and spatter is explored. The accuracy of spatter detection is greatly improved by using acoustic signal to assist the monitoring of welding process by coaxial vision and by detecting laser mold repair spatter in different aspects.
【作者單位】: 浙江大學(xué)寧波理工學(xué)院;浙江大學(xué)機(jī)械工程學(xué)院;哈爾濱理工大學(xué)材料科學(xué)與工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(51275468) 浙江省自然科學(xué)基金資助項(xiàng)目(Y1110262,LY12E05015) 黑龍江省自然科學(xué)基金資助項(xiàng)目(E201240) 寧波市自然科學(xué)基金項(xiàng)目(2014A610078) 浙江省零件軋制成形技術(shù)研究重點(diǎn)實(shí)驗(yàn)室開放基金資助項(xiàng)目(ZKL-PR-200303) 哈爾濱市優(yōu)秀學(xué)科帶頭人基金資助項(xiàng)目(2012RFXXG75)
【分類號(hào)】:TG665
[Abstract]:In the process of laser strengthening of die surface, when the laser energy per unit material reaches a certain value, the slight fluctuation of defocus will lead to spatter defect, which has a great influence on the surface strengthening quality of die. CCD coaxial vision is used to collect and process the laser hardening process in real-time. The width information of weld bead is extracted as a characteristic of spatter under certain current condition. However, the accuracy of the detection can not be guaranteed by the visual image alone, and the relationship between the intensity of acoustic signal and laser energy is directly related, which is verified by experiments. The relationship between root mean square (RMS) of acoustic signal and spatter is explored. The accuracy of spatter detection is greatly improved by using acoustic signal to assist the monitoring of welding process by coaxial vision and by detecting laser mold repair spatter in different aspects.
【作者單位】: 浙江大學(xué)寧波理工學(xué)院;浙江大學(xué)機(jī)械工程學(xué)院;哈爾濱理工大學(xué)材料科學(xué)與工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(51275468) 浙江省自然科學(xué)基金資助項(xiàng)目(Y1110262,LY12E05015) 黑龍江省自然科學(xué)基金資助項(xiàng)目(E201240) 寧波市自然科學(xué)基金項(xiàng)目(2014A610078) 浙江省零件軋制成形技術(shù)研究重點(diǎn)實(shí)驗(yàn)室開放基金資助項(xiàng)目(ZKL-PR-200303) 哈爾濱市優(yōu)秀學(xué)科帶頭人基金資助項(xiàng)目(2012RFXXG75)
【分類號(hào)】:TG665
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