基于机器视觉的高精度IC导线架电镀生产线控制系统

发布时间：2018-03-07 14:00

本文选题：机器视觉　切入点：伺服定位　出处：《苏州大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着科技的不断发展,电子产品的更新换代越来越快,并促成了国内对IC芯片、三极管等电子组件的需求不断增加。作为电子组件骨架的IC导线架(Lead Frame)需求量也不断增加。IC导线架又称为引线架或花架,为IC的骨干,扮演IC与PCB之间的接口角色。IC导线架的制造属于IC制造业的上游产业。本研究课题在参考借鉴国内外卷式电镀生产线的基础上,设计并实现了基于机器视觉的高精度IC导线架电镀生产线控制系统,阐述了机器视觉检测、伺服定位控制、变频调速、超声波测距等技术在高精度卷式IC导线架电镀生产线上的应用,解决了传统的使用伺服与PLC控制系统的电镀生产线存在的问题。本控制系统的优势在于:(1)基于机器视觉检测技术对定位孔重心位置进行测量,将测量值与目标值比较并计算出位置误差,然后通过伺服系统对误差进行及时补偿从而实现精准定位。在镀银精度上由原来的±8MIL(1MIL=0.0254mm)提高到现在的±4MIL。(2)基于超声波测距与变频调速,通过超声波测距对前后缓冲轮的高度进行测量并计算出生产速度,然后通过PLC控制变频器及时调整生产速度,防止速度变化过大影响生产工艺,从而实现工艺稳定。(3)通过有效技术整合与算法优化,研制了一套新的卷式IC导线架电镀控制系统,较传统的控制系统具有优势,表现为精度高、速度快、非接触检测等优点。生产实践表明使用新控制系统的IC导线架生产线,彻底解决了定位针打伤产品等问题,且具有位置偏差补偿功能——当位置偏差过大并超出补偿位置时,可以及时提示操作人员处理,避免了因误定位造成产品的大量报废。
[Abstract]:With the continuous development of science and technology, the upgrading of electronic products is becoming faster and faster, which has contributed to the development of IC chips in China. The demand for electronic components, such as Triode, is increasing. The demand for IC traverse frame, as the skeleton of electronic components, is also increasing. The IC traverse frame, also known as lead frame or flower frame, is the backbone of IC. As the interface between IC and PCB, the manufacture of IC traverse frame belongs to the upstream industry of IC manufacturing. The control system of high precision IC traverse rack electroplating production line based on machine vision is designed and realized. Machine vision detection, servo positioning control, frequency conversion speed regulation are described. The Application of Ultrasonic ranging Technology in the Electroplating production Line of High Precision Coil IC Traverse frame, The traditional electroplating production line using servo and PLC control system is solved. The advantage of this control system is that the center of gravity of the positioning hole is measured based on machine vision detection technology. The measurement value is compared with the target value and the position error is calculated. Then the error is compensated by the servo system in time to achieve accurate positioning. The accuracy of silver plating is improved from 卤8MIL / 1MIL 0.0254mm) to 卤4MIL / L / 2) based on ultrasonic ranging and frequency conversion. The height of the front and rear buffers is measured by ultrasonic distance measurement and the production speed is calculated. Then the frequency converter is controlled by PLC to adjust the production speed in time to prevent the change of speed from greatly affecting the production process. Therefore, through effective technical integration and algorithm optimization, a new electroplating control system for coil IC traverse frame is developed, which has advantages over the traditional control system, and is characterized by high precision and high speed. The production practice shows that the IC traverse frame production line with the new control system has completely solved the problem of positioning pin wound products, and has the function of position deviation compensation when the position deviation is too large and exceeds the compensated position. Can prompt operators to handle, avoid a large number of product scrap due to mispositioning.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN05

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