通讯行业的发展对高频电路板制造的需求越来越高,为确保高频信号的完整性和阻抗连续性,在PCB制造过程中采用和常规制造不同的工艺流程.全工艺流程的核心工艺为背钻工艺,背钻工艺采用有特殊控深功能的PCB数控机械钻孔机对多余的过孔分支进行钻除.在背钻加工过程中,钻深和钻浅是影响背钻功能的两大因素,特别是钻深.如果在加工过程中出现钻深,该通讯背板将无法使用,直接造成报废.通讯背板单价昂贵,且背钻工序处于全工序的后段工序,所以对设备和工艺可靠性要求很高.本文从PCB数控背钻机械钻孔机设备和背钻钻孔工艺的角度,对引起钻孔深度异常的原因进行大量的实验和分析,并给出可行的处理办法.

In this paper three methods of elevating PCBCNC drilling efficiency are presented and each method is im plem ented in real scenario and confirm ed to be workable by real test data. Com parison is doneinthesethreemethodsbyrealtestinordertofindefficiencygainofeachmethod,inthesame time,advantage and disadvantage of each m ethod is highlighted as well. In a conclusion,this paper provides a feasible reference for PCBCNC drilling machine or sim ilar drilling machine design and manufacturing.

印制线路板钻孔时采用的刀具直径种类很多,主要依靠人工排刀,为了确保机器在钻孔时自动抓取刀具的正确性,需要对6.35～0.1 mm直径的刀具进行精确的测量.对PCB机械钻孔机上传统的刀具直径测量方法进行了研究,指出了传统刀具直径检测传感器存在由于粉尘附着而引起的量取刀具直径精度误差的问题,并给出了有效可行的解决办法.同时,分析了刀具直径检测传感器输出波形中的噪声成分,给出了新的刀具直径计算办法.通过实验验证了优化后的方法比传统方法检测出的刀具直径精度更高,错误报警率更低.

D rilling is a key process in the production of printed circuit board (PC B ). Pressure foot plays an im portant role in the drilling process,and the w orkpiece m achining quality is close related w ith the com bining form of pressure foot and sucking dust cover. T he m ainstream com binatorial structures in the m arket are analysed w ith the help of test com bined w ith num erical sim ulation m ethod. T he paper presents a system atic solution of pressure foot design in engineering,appropriate param eter is obtained on the basis of a series of tests to achieve high perform ance of dust collection and high quality drilling.

基于Adams多体动力学分析软件对飞针测试机同步带传动系统进行仿真计算,研究同步带的运动特性.通过仿真获得测试头的加速度、速度及位移和同步带的受力等曲线,为飞针测试机同步带传动系统的设计和改进提供参考.

PCB ( Printed Circuit Board) is a kind of carrier of electronic products which has a distinc-tive feature involving light-size, light-weight, compressed-density, high-reliability and low-cost. PCB drilling machine tool as the key equipment used in PCB processing field is in procession of characteris-tics of high-speed, high-precision, high-stability and low-budget. Those requirements of high-perfor-mance drilling machine make it hard of product research and development. It is difficult to meet the re-quirement of design by tradition method. This paper is to provide up-to-data of market application and a new idea for product development for national and international fellow traders through studies into function design of PCB drilling equip-ments, market-application statistics,and comparisons among well-known products.