1. Point contact - a widely used type of five axis machining.

所谓的点接触加工是指在加工过程中点接触形成加工方法，如球面铣刀、球面砂轮磨削。这种类型的加工的主要特点是:球面法向量指向整个空间,表面法向量的处理有适应能力,和线,表面接触处理相比,其编程简单,计算,只要这工具半径小于曲率半径的表面可以避免干扰。因此适用于任何表面处理。但由于接触成型的原因，切削速度接近于零，因此切削条件差，加工精度和效率低。

Point contact machining refers to the processing method of forming contact at the middle point during the process of machining, such as spherical milling cutter and spherical grinding wheel. The main characteristics of this type of machining are: the spherical normal vector points to the whole space, and the surface normal vector processing has adaptability. Compared with the line and surface contact treatment, the programming is simple and the calculation is simple. As long as the tool radius is less than the radius of curvature, interference can be avoided. Therefore, it is applicable to any surface treatment. But because of the contact forming, the cutting speed is close to zero, so the cutting conditions are poor, and the machining accuracy and efficiency are low.

2、表面接触

2. Surface contact

所谓的表面接触加工是指表面接触形成加工方法，如磨面(磨)加工。这类加工的主要特点是:由于切割点具有较高的切削速度，所以循环进料较大，加工效率高，加工精度高。然而，由于模具的成型方法和刀具的形状，它主要适用于较平加工表面的凸曲线变化。

The so-called surface contact processing refers to the surface contact forming processing method, such as grinding surface (grinding) processing. The main characteristics of this kind of machining are: because the cutting point has a high cutting speed, the feed is recycled, the processing efficiency is high and the machining precision is high. However, due to the forming method and the shape of the tool, it is mainly suitable for the convex curve change of the flat surface.

3、线接触——五坐标加工数控加工电流和未来的研究。

3. Line contact - the research focus of the current and future of NC machining in five coordinate machining.

所谓的线接触加工是指加工过程中与线接触的过程，如圆柱形周铣、锥铣、凸轮轴钻进和带磨。这种加工的特点是切削速度高，加工精度高。同时，由于接触成型，加工效率得到了提高。已发展到任何曲面接触加工研究。

The so-called line contact machining refers to the process of contact with the line during the process, such as cylindrical milling, taper milling, camshaft drilling and belt grinding. The characteristics of this kind of machining are high cutting speed and high machining precision. At the same time, the processing efficiency has been improved due to contact forming. It has been developed to any surface contact machining research.

五轴雕刻机的优势在于工件容易夹紧。加工无特殊夹具，减少夹具成本，避免了大量夹具，提高模具加工精度。使用五轴加工模具可以减少使用的夹具数量。另外，由于五轴机床可以在加工过程中节省很多特殊的工具，所以降低了刀具的成本。五轴数控机床可以提高刀具的有效切削刃长度，减少切削力，提高刀具寿命，降低成本。

The advantage of five axis engraving machine is that the workpiece is easy to clamp. There are no special fixtures in the process, which reduces the cost of the fixture, avoids a large number of clamps, and improves the machining accuracy of the die. The number of fixtures used can be reduced by using five axis machining dies. In addition, the cost of the tool is reduced because the five axis machine tool can save a lot of special tools in the process of machining. The five axis CNC machine tool can improve the effective cutting edge length, reduce cutting force, improve the tool life and reduce the cost.

使用五轴机床加工模具可快速完成模具加工，快速交货，更好的保证模具加工质量，模具加工变得更容易，并使模具修改更容易。在传统的模具加工中，一般采用立式加工来完成工件的铣削加工。随着模具制造技术的不断发展，立式加工本身的一些缺点也越来越明显。现代模具加工一般使用球头铣刀来处理,球铣刀在模具加工的好处很明显,但是如果立式加工,然后底部的线路速度为零,所以完成的底部很差,如果用四、五轴加工加工技术加工模具,可以克服以上的缺点。

The die processing can be completed quickly by using five axis machine tool, and the delivery can be made quickly, so as to ensure the quality of the die processing better. The mold processing becomes easier and the modification of the die is easier. In the traditional die processing, vertical machining center is generally used to finish the milling of workpiece. With the development of mold manufacturing technology, some shortcomings of vertical machining center itself are becoming more and more obvious. Ball end milling cutter is generally used in modern die processing. The advantages of ball milling cutter in die processing are obvious. However, if the vertical machining center and the line speed of the bottom is zero, the bottom is very poor. If the four or five axis processing technology is used to process the mold, the above shortcomings can be overcome.