In order to formulate a feasible and efficient process flow for NC cutting machine, we should grasp the following basic principles:

一、同步原则就是产品的零部件大方向以产品为单位，小方向以产品的单件包装件数为单位，控制各零部件尽量同时或在尽可能小的时差内达到包装工序，避免包装时等件现象这里面的内容其实就是工艺流程表中的工时项目产品各零部件的工时要清晰准确可操作性强综合因素考虑得全到位

1、 The synchronization principle is that the general direction of the parts of the product is in the unit of the product, and the small direction is in the unit of the number of single packages of the product. Control the parts to reach the packaging process at the same time or within the time difference as small as possible, so as to avoid the phenomenon of parts during packaging. In fact, the content is the man hour item in the process flow table. The man hour of each part of the product should be clear, accurate, operable and fully considered

二、顺流原则尽量避免产品零部件在生产线上工序倒流，出现倒流现象会阻障其它零部件的正常流程，就像路上行驶的车流，使整个车间流程出现无序状态，不利于管理者的操控，这里的内容就是工艺流程表里的工序排列顺序其中的难点就是如何解决各零部件生产工序的交叉作业与同步到达的矛盾

2、 In the downstream principle, try to avoid the reverse flow of product parts in the production line. The reverse flow phenomenon will hinder the normal process of other parts, just like the traffic flow on the road, which makes the whole workshop process disordered and is not conducive to the control of managers. The content here is the sequence of processes in the process flow table, and the difficulty is how to solve the contradiction between cross operation and synchronous arrival of production processes of various parts

三、充分性原则就是每道工序避免工序自身的浪费比如：开料工序本来设备可以一次同时开料三块板，而将其设计成两块板再如排钻工序一块板上的孔位本可以两次可完，而你将其设计成三次或四次打完，这些都会产生工序自身的浪费从而影响加工效率，要想做好这些一点就是相应的工艺文件要全，也就是开料工序要有开料图，而且要编制锯路顺序，排钻工序要有钻孔图，而且要针对不同型号的排钻有不同更优化钻孔方案，同时要结合工时去进行操控

3、 The principle of sufficiency is to avoid the waste of each process itself. For example, in the blanking process, the equipment can cut three plates at the same time, but it is designed into two plates. In the row drilling process, the hole position on one plate can be finished twice, but you design it to be finished three or four times, which will lead to the waste of the process itself and affect the processing efficiency. The first thing to do well is to complete the corresponding process documents, In other words, there should be a cutting drawing for the cutting process, and the sawing sequence should be prepared. There should be a drilling drawing for the drilling process, and the drilling scheme should be optimized for different types of drilling. At the same time, it should be controlled in combination with the working hours

四、质量原则任何工序在提高功效时都不能以牺牲产品质量为代价，因为产品质量才是产品的生命，在保质的前提下才能更大化的量产

4、 Quality principle no process can improve efficiency at the expense of product quality, because product quality is the life of the product, and mass production can be greater on the premise of quality assurance

五、渐进原则一个好的工艺流程设计其实只是下一个更好的更好的流程设计的开端，工艺设计本身就是一个在实践中不断摸索不断完善的过程，只有更好没有更好。

5、 Progressive principle a good process design is only the beginning of the next better process design. Process design itself is a process of continuous exploration and improvement in practice, only better is not better.