5 axis cnc machine center application for the car

Writer： admin Time：2020-07-06 10:36 Browse：℃

5 axis cnc center for the car mould 

At present, the Soldworks is mainly used for the design of auto parts, and the parts are designed through reverse engineering and various tests. The complex surface of the processing mold uses soldworks software. However, how to ensure the accuracy of design and processing depends on CNC machining, we  analyzes the relationship between the application of the five-axis machining center in mold processing and the quality of automotive molds.

    1 Processing of deep cavity molds

    In the process of automobile mold manufacturing, if you use a three-axis machining center when processing deep cavity molds, you must lengthen the shank and tool to achieve it. However, when using a five axis machine  center to process deeper and steeper cavities, you need to give the mold Processing creates better process conditions. The additional rotation and swing of the workpiece or the spindle head can appropriately shorten the length of the tool, thereby preventing the collision of the tool with the tool bar and the cavity wall, and reducing the tool during processing Jitter and damage, the service life of the tool is extended, and the surface quality and processing efficiency of the mold are greatly improved.

    2 Processing of mold side 

    For the processing of the mold side , the tool length of the three-axis machining center is larger than the depth of the side . The depth of the side determines the tool length. If the length of the tool is increased, its strength will be significantly reduced. If the length of the tool is higher than 3 The phenomenon of double-diameter cutting will occur, and the quality of the workpiece will be difficult to guarantee. For example, if a five-axis machining center is used to process the side of the mold, the spindle or the workpiece can be used to swing the tool and the side  of the mold to be perpendicular. A plane milling cutter can be used when milling the side wall of the mold, which can improve the quality of the workpiece And extend the service life of the tool.

    3 Flat surface processing of the mold

    For the processing of flat surfaces of the mold, the three-axis machine center needs to be milled with a ball cutter to obtain good surface quality. In this case, the tool path needs to be increased, but the center rotation linear speed of the ball head cutter is almost zero. When the mold is processed, the damage of the tool is greater, the service life of the tool will be shortened, and the surface quality of the mold will also deteriorate. Using a five-axis machining center to process a flat surface, the tool can be processed at a certain angle on the workpiece and then the workpiece can be processed. This can increase the relative linear speed between the workpiece and the ball head cutter, which can not only make the service life of the tool Increase, the surface quality of the workpiece will also be greatly improved.

    4 Processing irregular surfaces of the mold

    For the processing of molds with irregular curved surfaces, in the past, it was generally done through a three-axis machining center. The direction of the tool cutting mold is to move along the entire cutting path. The cutting process will not change. At this time, the state of the cutting edge of the tool The perfect quality of each part of the mold cannot be guaranteed. For example, molds with more frequent curvature changes and molds with deeper grooves can be processed by a five-axis machining center. The cutting tool can always optimize the cutting state, and the tool can maximize the direction of the entire processing path. At the same time, the cutter can also perform linear motion, and each part of the mold surface will be more perfect.

    5 Processing of different geometric shapes of molds

    When using a five-axis machining center to process a mold with a three-dimensional curve plane, the cutting process of the mold is always protected in the best working state. The working angle of the tool can be changed in any area of the machine tool processing, thereby completing the geometry of the mold Processing.

    6 Machining of inclined holes on the inclined surface of the mold

    When processing the inclined surface of the mold, the five-axis machining center can be used to swing the head of the swing-type machine tool to place the spindle on the vertical side of the workpiece and locate the accurate hole position. In order to accurately process oblique holes 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. For processing inclined surfaces, such as a five-axis machining center with a table, the action is to place the inclined surface of the mold at a position perpendicular to the main shaft through the machine table. The processing of a single motion of a linear axis of the main shaft can be completed, which can be obvious Improve the accuracy of the hole.

   7 Milling of straight lines with no direction change of the mold

    If you want to mill a straight line with no change in direction, you only need to draw a straight line at the tip of the tool. If the direction needs to be changed, you can draw a curve at the tip of the tool. The direction of the tip of the tool is changed. It is extremely important to apply the five-axis machining center to the necessary compensation for the curve. If the control system does not consider the length of the tool, the tool rotates around the axis center, the tool tip cannot be fixed, and it is likely to move out of the current working position, but the five-axis machining center system has five-axis control Function, in the operation of processing the mold, although the direction of the tool is changed using the five-axis control system, the position of the tool tip can be kept unchanged. During this process, the necessary compensation motion of the xyz axis is also automatically calculated. At this time, the machining accuracy is significantly improved.

   In short, in the mold processing, the application of a five-axis machining center can avoid the interference of the tool, and it can process complex parts that are difficult to be processed by ordinary three-coordinate machine tools. The processing quality is good and the efficiency is high. For three-dimensional profile, especially large and flat surface processing, it can be processed by the end of the large-diameter end mill close to the large surface, the number of passes will be reduced, the residual height is small, and the processing efficiency and surface quality can be effectively improved . Multi-process and multi-face machining can be performed by clamping multiple 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 also be effectively improved. When using a five-axis machining center to process molds, for the workpiece, the tool can always be in the most effective cutting state. In some processing fields, large-size tools can be used to avoid mutual interference. The rigidity of this tool Better, both processing accuracy and processing efficiency can be improved. Therefore, the processing adaptability of the five-axis machining center is wide, and it is worthy of extensive promotion.

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