How does the surface roughness of cnc processed aluminum alloy reach 0.8?

Use a milling cutter with a large diameter and the rotation speed should be as high as possible, but the machine tool should not vibrate. The rough milling should have a margin of 0.3-0.5mm before finishing. Whether it can be achieved depends on whether the linear speed of the milling cutter is enough, whether the blade is sharp or not . The larger diameter of the milling cutter disk is to easily achieve high linear speed, and it is not good to increase the speed without increasing the diameter of the milling cutter disk. The general situation for this is that it can achieve 0.8 roughness. In addition, a sufficient amount of cutting fluid should be added during fine milling.

  What is the surface roughness of CNC machining?

  Generally, the general machine tools are processed around 3.2, and the high-speed machine can reach 1.6 finish; pay attention to the tools and cutting parameters used during processing.

  Is the smaller the surface roughness value of the part, the finer it is?

  1. About profiler and roughness meter Profiler and roughness meter are not the same product, the main function of the profiler is to measure the contour shape of the surface of the part.

  For example: the groove depth, groove width, chamfering (including chamfering position, chamfering size, angle, etc.) of the groove in the automobile part, the straightness of the straight line of the cylindrical surface and other parameters. In short, the profiler reflects the macro outline of the part.

  2. The function of the roughness meter is to measure the surface processing quality of the grinding/finishing process of the surface of the part. In layman's terms, the surface of the part is polished (the roughness is called the roughness in the old national standard), that is, the roughness reflects the The micro condition of the surface of the part.

    CNC precision machining is still widely involved in the industry. Why do we say this? In fact, we can all see it in life. The effect is obvious, and it will be more used in some mechanical equipment. You need to know CNC precision parts processing also has high requirements for precision machining. Why, because customers are demanding quality, and this CNC precision parts processing itself has great advantages, it must be better and more trusted by customers. This is CNC. Precision machining needs to be done.

  1. The feed path of CNC CNC lathe for milling plane parts

   When generalizing the milling plane parts, the side edge of the end mill is usually used for cutting. In order to reduce the marks of the joints and ensure the appearance of the parts, the procedures for cutting in and out of the tools are carefully designed.

  When the external appearance of milling is summarized, the cut-in and cut-out points of the milling cutter should be cut in and out of the external appearance of the part along the extension line of the general curve of the part, and the part should not be cut directly in the normal direction to avoid scratches on the processed surface and ensure the part General lubrication.

  When milling the closed inner outline, if the inner outline curve allows extension, it should be cut in and out along the tangent direction. If the inner summary curve does not allow for extension, the tool can only cut in and out along the normal direction of the inner summary curve, and select its cut-in and cut-out points at the intersection of two or more elements in the part summary. When several internal elements are tangent and there is no intersection, in order to avoid leaving the notch at the generalized corner when the cutter compensation is cancelled, the cutting point of the cutting tool should be far from the corner.

  Shown is the tool path when the circular interpolation method mills the outer circle. When the full circle processing is completed, do not retract the tool at the cutting point, but let the tool move an additional distance along the tangent direction to avoid the tool offset when the CNC lathe tool collides with the surface of the workpiece, which constitutes the workpiece scrap. When milling inner arcs, the principle of tangential cutting should also be followed, and the optimal organization of the transition from arc to arc processing path can improve the processing accuracy and quality of the inner surface.