应用于SMT生产的高精度支撑夹具设计  

Design of High-precision Support Fixtures Used in SMT Production

作　　者：徐平凡[1] 肖文勋[2] 徐鸣利 黄健 Xu Pingfan;Xiao Wenxun;Xu Mingli;Huang Jian(School of Mechanical and Electrical Engineering,Zhongshan Polytechnic,Zhongshan,Guangdong 528404,China;School of Electric Power,South China University of Technology,Guangzhou 510640,China;Zhongshan Songlian Electronic Technology Co.,Ltd.,Zhongshan,Guangdong 528408,China)

机构地区：[1]中山职业技术学院机电工程学院,广东中山528404 [2]华南理工大学电力学院,广州510640 [3]中山市松联电子科技有限公司,广东中山528408

出　　处：《机电工程技术》2021年第11期116-118,188,共4页Mechanical & Electrical Engineering Technology

基　　金：广东省特色创新项目(编号:2020KTSCX328);广东省中山市科技项目(编号:2020B2032);中山职院重大科技项目(编号:KYA2001)。

摘　　要：传统贴片机(SMT)在更换贴装产品时,需人工进行布置顶针,费力耗时,且易使布针位置偏差而造成芯片损坏和报废。针对该问题,设计了一种新型支撑顶针夹具,包括固定座、高精度支撑机构、弹性机构、固定座垫块和底座等。通过在支撑顶针的下方独立式弹簧控制顶针高度,电路板上的高低元器件均可良好地支撑,提升贴装品质。该设备已应用到实际生产中,通过对比改造前后的数据发现,布置顶针的PIN图从30 min降低到3~5 min,次品率从8‰~10‰大幅度下降至3‰,各项技术指标较好。Existing SMT require manual placement of thimble when replacing placement products, which is laborious and time-consuming,and it is easy to cause chip damage and scrap due to deviation of the needle position. In order to solve this problem, a new type of support thimble mechanism was designed, including fixed seat, high-precision support mechanism, elastic mechanism, fixed seat cushion and base.Through the independent spring under the support thimble to control the height of the thimble, the high and low components on the circuit board could be well supported, which improved the placement quality. Finally, the equipment was built to verify the feasibility in the practice,the detailed experimental data were proposed. The time required to arrange the thimble is reduced from 30 min to 3~5 min, and the defect rate has dropped from 8‰~10‰ to 3‰. The technical indicators are good.

关 键 词：贴片机 高精度夹具 支撑顶针 独立式弹簧 

分 类 号：TH122[机械工程—机械设计及理论]