Five-axis CNC machining is a very important part of CNC machining. This technology has been widely used in the fields of automotive, light industry, medical, marine, aerospace, and other high-precision instrument manufacturing. In the traditional mold processing, the three-axis machining center and the vertical machining center are commonly used to complete the milling of the workpiece. Along with the continuous development of China’s mold manufacturing and processing technology, some weaknesses of the traditional three-axis machining center and vertical machining center have gradually emerged. For example, in the current mold processing, the ball-end milling cutter is more commonly used. The advantage of using a ball-end milling cutter in the mold processing is obvious, but if used in a vertical machining center, the bottom line speed is zero, and the finish is also Poor, such as the processing of the mold through the five-axis machining center, the above deficiencies can be completely overcome. 1, the advantages of five-axis processing In the five-axis machining, the flat-bottomed milling cutter maintains the vertical state of the complex mold processing surface, which greatly helps to reduce the processing time. Based on the principle of the five-axis machining center, it is also suitable for side milling of angled surfaces, which can eliminate the rib-like lines caused by the ball end mill processing, making the surface quality of the mold more ideal and reducing the cause. The amount of manual milling and manual work required to clean the mold surface reduces the cost. Through the five-axis machining technology, the problem that the workpiece can be repositioned at a complex angle requires multiple debugging and clamping problems, not only shortening the time, but also greatly reducing the error generated during the installation of the workpiece. The large cost of fixtures has also been saved, and the machine tool has also processed complex parts! For example, drilling, taper machining, cavity crypts, etc. required for complex surfaces are not possible with conventional machining methods. The tool used in the five-axis machining is shorter, and the entire part can be processed in one time, without the need for re-installing or using the longer tool required in the same three-axis machining, in a shorter time. The mold is finished in the mold, and the surface quality of the parts is also good. 2. Application of five-axis machining center in automobile mold processing At present, the CAD system is mainly used to design auto parts, and the parts are designed through reverse engineering and various tests. The complex surface of the mold is CAM software. However, how can we ensure the precision of design and processing? This depends on CNC machining. The following is a brief analysis of the relationship between the application of the five-axis machining center in the mold processing and the quality of the automotive mold. 2.1 Processing of deep cavity molds In the process of automobile mold manufacturing, when machining a deep cavity mold, if you want to apply a three-axis machining center, you must lengthen the tool holder and the tool. However, when you use a five-axis machining center to process deeper and steeper cavities, you want to give Mold processing creates better process conditions. Through the additional rotation and swing of the workpiece or the spindle head, the tool length can be appropriately shortened, thereby eliminating the occurrence of collision between the tool and the cutter bar and the cavity wall, and reducing the machining time. The tool is shaken and damaged, the service life of the tool is extended, and the surface quality and processing efficiency of the mold are greatly improved. 2.2 Machining of mold sidewalls For the machining of the side wall of the mold, the length of the tool used in the three-axis machining center is larger than the depth of the side wall. The length of the tool is also determined by the depth of the side wall. If the length of the tool is increased, the strength will be significantly reduced. With 3 times the diameter, the knife phenomenon will occur and the quality of the workpiece will be difficult to guarantee. If the five-axis machining center is used to machine the sidewall of the mold, the spindle or the workpiece can be oscillated so that the tool and the side wall of the mold are always in a vertical state. When milling the side wall of the mold, a face milling cutter can be used, which can improve the workpiece. Quality and extend the life of the tool. 2.3 mold flat surface processing When machining a flat surface with a flat mold, the three-axis machining center needs to be finished with a ball cutter to obtain a good surface quality. In this case, the tool path needs to be increased, but the center rotation speed of the ball-end cutter tool is almost zero. The degree of damage to the tool during the processing of the mold is large, the service life of the tool is drastically reduced, and the surface quality of the mold is also deteriorated. Applying a five-axis machining center to machine a flat surface, the workpiece can be machined at a certain angle on the workpiece, which can increase the relative line speed between the workpiece and the ball-end knife, which not only can make the tool life Improve, the surface quality of the workpiece will also be greatly improved. 2.4 Processing of irregular surfaces of molds For the machining of molds with irregular curved surfaces, it has been generally done by a three-axis machining center. The cutting direction of the tool cutting tool is not changed when the cutting process moves along the entire path of the cutting, and the cutting edge state of the tool is changed. The perfect quality of all parts of the mold cannot be guaranteed. Dies with deeper curvature and molds with deeper grooves The tool can be machined through a five-axis machining center. The cutting tool always optimizes the cutting state. The tool can optimize the movement direction of the entire machining path, and the tool can also perform linear motion at the same time. Every part of the surface will be perfect. 2.5 Machining of different geometric shapes of the mold When applying a five-axis machining center to a mold with a three-dimensional curved plane, the cutting of the mold is always protected in an optimal working state, and the working angle of the tool can be changed in any area of the machine tool to complete the geometric mold. machining. 2.6 Machining of inclined holes on the inclined surface of the mold When machining the inclined hole of the mold bevel, the five-axis machining center can be used to position the spindle in the aspect of the inclined surface of the workpiece by the swinging operation of the oscillating machine tool and position it in the accurate hole position. In order to accurately machine the oblique hole on the mold, at least two linear axis interpolation movements are required, and the accuracy of the hole position is also significantly reduced in this process. Machining the oblique face, such as the five-axis machining center with the pendulum, the action is to place the inclined surface of the mold at the position perpendicular to the main axis through the machine table, and the processing of the single moving inclined hole of one of the linear axes can be completed. Improve the accuracy of the hole. 2.7 Milling of the mold without direction change To mill a straight line without direction change, as long as the tool tip is drawn straight, if the direction needs to be changed, the tool tip can be drawn, the tool tip direction is changed, then you want a straight line, you have to give this It is extremely important that the curve is compensated with the necessary five-axis machining center. If the control system does not take into account the length of the tool, the tool rotates around the center of the shaft. The tool tip cannot be fixed and it is very likely to move out of the current working position, but it has five-axis control in the system of the five-axis machining center. Function, in the operation of the machining mold, the five-axis control system is used, although the direction of the tool is changed, but the position of the tool tip can be kept unchanged. In this process, the necessary compensation motion of the xyz axis is also automatically calculated. At this time, the processing accuracy is significantly improved. In short, in the mold processing, the application of the five-axis machining center can avoid the interference of the tool, and can process the complicated parts that are difficult to be machined by the ordinary three-coordinate machine tool. For the processing of the ruled surface mold, the side milling type one-tool forming technology can be used. The processing quality is good and the efficiency is high. For the three-dimensional profile, especially for large flat surface machining, it can be processed by the large-diameter end mill end close to the large surface, the number of passes will be reduced, the residual height will be small, and the processing efficiency and surface quality can be effectively improved. . The multi-step and multi-face machining can be performed on a plurality of space surfaces of the mold at one time, so that the processing efficiency is improved, and the accuracy of the mutual position of each surface can be effectively improved. When machining a mold with a five-axis machining center, the tool can always be in the most effective cutting state for the workpiece. In some machining fields, large-sized tools can be used to avoid mutual interference. Preferably, both machining accuracy and machining efficiency can be improved. Therefore, the five-axis machining center has a wide processing adaptability and is worthy of widespread promotion.