泊头市卓远机械设备制造有限公司

龙门刨铣床的技术参数

线路板龙门刨铣床的铣技术包括选择走刀方向、补偿方法、定位方法、框架的结构、下刀点，都是保证铣加工精度的重要方面。

1.走刀方向补偿方法：
当铣刀切入板材时，有一个被切削面总是迎着铣刀的切削刃，而另一面总是逆着铣刀的切削刃。前者，被加工面光洁，尺寸精度高。主轴总是顺时针方向转动，所以不论是主轴固定工作台运动或是工作台固定主轴运动的龙门刨铣，在铣印制板的外部轮廓时，要采用逆时针方向走刀，这就是通常所说的逆铣，而在线路板内部铣框或槽时采用顺铣方式。铣板补偿是在铣板时，机床自动安照设定值让铣刀自动以铣切线路的中心偏移所设定的铣刀直径的一半，即半径距离，使铣切的外形与程序设定保持一致。同时如机床有补偿的功能必需注意补偿的方向和使用程序的命令，如使用补偿命令错误会使线路板的外形多或少了相当于铣刀直径的长度和宽度的尺寸。

2.定位方法和下刀点：
定位方法可分为两种：一是内定位，二是外定位。定位对于工艺制定人员也十分重要，一般在线路板前期制作时就应确定定位的方案。外定位是另一种定位方法，是采用在板子外部加定位孔作为铣板的定位孔。其优点是便于管理，如果先期制作规范好的话，铣板模板一般在十五种左右。由于使用外定位所以不能一次将板铣切下来，否则线路板十分容易损坏，特别是拼板，因铣刀和吸尘装置会将板子带出造成线路板损坏和铣刀折断。而采用分段铣切留结合点的方法，先铣板当铣板完了以后程序暂停然后将板用胶带固定，执行程序的第二段，使用3mm至4mm的钻头将结合点钻掉。其优点是模板少费用小易于管理，可铣切所有板内无安装孔和定位孔的线路板，小工艺人员管理方便，特别是CAM等先期制作人员的制作可简单化，同时可优化基材的利用率。缺点是由于使用钻头，线路板外形留有至少2－3个凸起点不美观，可能不符合客户要求，铣切时间长，工人劳动强度稍大。

Milling technology of PCB gantry planer and milling machine includes choosing the direction of cutter, compensation method, positioning method, frame structure and cutting point, which are all important aspects to ensure milling accuracy.

1. Compensation method for tool direction:

When the milling cutter cuts into the sheet metal, there is a cutting face always facing the cutting edge of the milling cutter, and the other side always facing the cutting edge of the milling cutter. The former has a smooth surface and high dimensional accuracy. The spindle always rotates clockwise, so whether it is the spindle fixed worktable movement or the worktable fixed spindle movement of the gantry milling, when milling the external contour of the printed circuit board, the counter-clockwise tool should be used, which is commonly referred to as reverse milling, while in the circuit board internal milling frame or groove, the way of forward milling is used. Milling board compensation is that when milling board is used, the machine tool automatically fixes the setting value so that the milling cutter automatically deviates from the center of the milling line by half of the diameter of the milling cutter, that is, the radius distance, so that the shape of the milling cutter is consistent with the program setting. At the same time, if the machine tool has the function of compensation, it must pay attention to the direction of compensation and the command of the application program. If the error of the command of compensation is used, the shape of the circuit board will be more or less equal to the length and width of the milling cutter diameter.

2. Positioning method and cutting point:

There are two kinds of positioning methods: internal positioning and external positioning. Location is also very important for process planners. Generally, the plan of positioning should be determined during the pre-production of circuit boards. External positioning is another positioning method, which uses positioning holes outside the plate as positioning holes of the milling plate. Its advantage is easy to manage, if the pre-production standard is good, the milling plate template is generally about 15 kinds. Because of the use of external positioning, the board can not be cut off at one time, otherwise the circuit board is very easy to damage, especially the splicing board, because the milling cutter and vacuum device will take the board out, causing circuit board damage and milling cutter breakage. By using the method of sectional milling and cutting to retain the joint point, the milling board is suspended after the milling board is finished, and then the board is fixed with tape. The second part of the program is executed, and the joint point is drilled out with a bit of 3mm to 4mm. Its advantage is that the template is small in cost and easy to manage. It can milling all PCBs without installation holes and positioning holes. It is convenient for small technicians to manage. Especially, the production of pre-fabricators such as CAM can be simplified, and the utilization rate of substrate can be optimized. The disadvantage is that with the use of drills, the PCB has at least 2-3 bumps which are not beautiful, may not meet customer requirements, milling time is long, and the worker's labor intensity is slightly higher.

Company name: botou zhuoyuan mechanical equipment manufacturing co.,LTD
Registered address: jiaohe development zone, botou city, hebei province
Fax number: 0317-8031093
Contact information: 15369812793 (WeChat with the same number)  liansheng chu
Postcode: 062151
Enterprise email:1358827475@qq.com
Account Opening Bank: Botou Branch of Bank of China
Account number: 100399943203
Agricultural bank account number: 6228481739059615270