汽车板切边质量控制与改善

QUALITY CONTROL AND IMPROVEMENT OF CUTTING EDGE OF AUTOMOBILE PLATE

质量是钢铁企业的生存之本,全面提升产品质量、降低生产成本,是企业可持续发展的重要措施。对于高级别镀锌汽车板来说,表面质量要求更加严格,质量控制是汽车板生产的重中之重。高等级汽车板在经过连退或者镀锌热处理后需进行圆盘剪切边处理,以保证带钢达到客户的尺寸要求,良好的切边质量是客户稳定使用的保证。切边不良缺陷是汽车板生产过程中发生率较高的缺陷,需对容易造成切边不良缺陷的点位进行重点分析治理,并制定一系列缺陷预防与控制的措施,才能保证产品质量的稳定性。常见的切边不良缺陷主要由圆盘剪工艺参数不良、去毛刺辊效果不佳等原因造成。为提高圆盘剪切边质量及运行稳定性,对剪切过程中的亮印、划伤缺陷产生原因进行了深入分析和改善,通过优化剪刃切边参数、强化剪刃装配精度、匹配剪刃使用310、318 mm肖氏80度的5 mm倒直角上下压环、选用辊面直径为1000 mm的去毛刺辊等措施,汽车板的边部质量得到显著改善,切边不良率降低至0.5%以下。

Quality is the survival of iron and steel enterprises,the overall improvement of product quality,reduce production costs,is an important measure for sustainable development of enterprises.For high-grade galvanized automobile sheet,surface quality is more strict,and quality control is the most important in the production of automobile sheet.High-grade automobile sheet after continuous retreat or galvanizing heat treatment need to be cut edge treatment to ensure that the strip to meet the customer's size requirements,good edge cutting quality is the customer's guarantee of stable use.It is necessary to analyze and deal with the points which are easy to cause the defects,and to make a series of measures to prevent and control the defects,to ensure the stability of product quality.The common side-cutting defects are mainly caused by the bad technological parameters of disc shear and the poor effect of deburring roller.In order to improve the cutting edge quality and operation stability of the disc,the causes of bright printing and scratch defects in the cutting process were analyzed and improved,by optimizing the cutting edge parameters,enhancing the assembling precision of the cutting edge,matching the cutting edge with 5 mm chamfer right-angle up-down ring of 310,318mm Shaw's 80 degrees,choosing the deburring roller with the diameter of 1000 mm,etc.,the edge quality of the automobile sheet was significantly improved,and the bad trimming rate was reduced to less than 0.5%.