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不锈钢磁控单面电阻点焊工艺应用研究 

发布(bu)时(shi)间:2021-06-29

针对不锈钢(gang)地铁车辆单面(mian)(mian)点焊(han)(han)(han)(han)的内(nei)(nei)外(wai)质量问题(ti),对磁控(kong)单面(mian)(mian)点焊(han)(han)(han)(han)技(ji)术规范进行了(le)优化,对比传统点焊(han)(han)(han)(han),缺(que)口(kou)的视(shi)觉外(wai)观(guan)和(he)(he)凸度研究了(le)焊(han)(han)(han)(han)接参(can)数、点焊(han)(han)(han)(han)方(fang)法等因(yin)素、高度和(he)(he)内(nei)(nei)部(bu)组织(zhi)对点焊(han)(han)(han)(han)接头(tou)(tou)的影响。结果表明,单面(mian)(mian)磁控(kong)点焊(han)(han)(han)(han)在外(wai)观(guan)质量和(he)(he)宏观(guan)熔(rong)核质量方(fang)面(mian)(mian)均优于传统点焊(han)(han)(han)(han),大大提(ti)高了(le)焊(han)(han)(han)(han)接接头(tou)(tou)的成核能力。

现有(you)的(de)(de)(de)不(bu)(bu)(bu)(bu)上(shang)漆不(bu)(bu)(bu)(bu)锈(xiu)钢轨道车辆主要采用(yong)电(dian)阻(zu)(zu)点(dian)(dian)(dian)焊(han)(han)(han)(han)(han)(han)技术。电(dian)阻(zu)(zu)点(dian)(dian)(dian)焊(han)(han)(han)(han)(han)(han)工(gong)艺(yi)热输入低,焊(han)(han)(han)(han)(han)(han)缝(feng)(feng)(feng)变形小,工(gong)艺(yi)适(shi)应性好,焊(han)(han)(han)(han)(han)(han)缝(feng)(feng)(feng)质(zhi)量(liang)高(gao)(gao)(gao)。但由于压焊(han)(han)(han)(han)(han)(han)工(gong)艺(yi)的(de)(de)(de)特点(dian)(dian)(dian),点(dian)(dian)(dian)焊(han)(han)(han)(han)(han)(han)车外(wai)表面(mian)(mian)有(you)明(ming)显的(de)(de)(de)痕(hen)迹;时(shi),不(bu)(bu)(bu)(bu)锈(xiu)钢具有(you)电(dian)阻(zu)(zu)率高(gao)(gao)(gao)、导热系(xi)数低、热膨胀系(xi)数大、耐高(gao)(gao)(gao)温(wen)等特点(dian)(dian)(dian),在(zai)(zai)焊(han)(han)(han)(han)(han)(han)接(jie)(jie)过(guo)程中(zhong)容易产生裂纹、气孔、晶间(jian)腐蚀和晶粒粗大,降(jiang)低了机械强(qiang)度。关节(jie)的(de)(de)(de)属性。因此,开发(fa)一种既能提(ti)(ti)高(gao)(gao)(gao)焊(han)(han)(han)(han)(han)(han)核(he)内(nei)在(zai)(zai)质(zhi)量(liang),又能有(you)效降(jiang)低焊(han)(han)(han)(han)(han)(han)缝(feng)(feng)(feng)表面(mian)(mian)凸(tu)点(dian)(dian)(dian)高(gao)(gao)(gao)度的(de)(de)(de)单面(mian)(mian)点(dian)(dian)(dian)焊(han)(han)(han)(han)(han)(han)方(fang)法是十(shi)分(fen)必(bi)要和紧迫的(de)(de)(de)。笔者在(zai)(zai)单面(mian)(mian)点(dian)(dian)(dian)焊(han)(han)(han)(han)(han)(han)枪(qiang)的(de)(de)(de)电(dian)极(ji)棒上(shang)组装永磁(ci)(ci)体,实现焊(han)(han)(han)(han)(han)(han)接(jie)(jie)过(guo)程中(zhong)的(de)(de)(de)电(dian)磁(ci)(ci)搅(jiao)动,研(yan)究了焊(han)(han)(han)(han)(han)(han)接(jie)(jie)电(dian)流(liu)、电(dian)极(ji)压力、焊(han)(han)(han)(han)(han)(han)接(jie)(jie)时(shi)间(jian)对焊(han)(han)(han)(han)(han)(han)接(jie)(jie)接(jie)(jie)头(tou)强(qiang)度和外(wai)观的(de)(de)(de)影响。研(yan)究了适(shi)用(yong)于无涂层不(bu)(bu)(bu)(bu)锈(xiu)钢车辆的(de)(de)(de)单面(mian)(mian)电(dian)阻(zu)(zu)点(dian)(dian)(dian)焊(han)(han)(han)(han)(han)(han)工(gong)艺(yi),完成了不(bu)(bu)(bu)(bu)锈(xiu)钢电(dian)阻(zu)(zu)点(dian)(dian)(dian)焊(han)(han)(han)(han)(han)(han)的(de)(de)(de)光(guang)狭缝(feng)(feng)(feng)磁(ci)(ci)控焊(han)(han)(han)(han)(han)(han)接(jie)(jie)技术的(de)(de)(de)开发(fa)。从而提(ti)(ti)高(gao)(gao)(gao)焊(han)(han)(han)(han)(han)(han)核(he)的(de)(de)(de)内(nei)在(zai)(zai)质(zhi)量(liang),提(ti)(ti)高(gao)(gao)(gao)接(jie)(jie)头(tou)的(de)(de)(de)整体力学性能;尽量(liang)减少焊(han)(han)(han)(han)(han)(han)缝(feng)(feng)(feng)凸(tu)痕(hen)高(gao)(gao)(gao)度,提(ti)(ti)高(gao)(gao)(gao)外(wai)壳美观度。


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