What are the requirements for the selection of CNC precision machining tools?(2)

 2. CNC precision machining is divided according to cutter head:

　　● Flat-bottomed knife: used for flat and straight side, clear the flat angle

　　 ● Ball knife: used for various surface medium light and light knife.

● Bull nose knife (with one side, two sides and five sides): used for steel roughing (R0.8, R0.5, R0.3, R0.4) ● rough leather knife: used for roughing, pay attention to the margin Stay in France (0.3) 3. According to the cutter bar:

　　 ● Straight rod cutter: Straight rod cutter is suitable for various occasions

　　 ● Inclined rod cutter: but not applicable to straight body surface and the surface whose slope is less than the slope of the rod 4. According to the blade:

　　 Two-blade, three-blade, and four-blade, the more the number of blades, the better the effect, but the more work, the speed and feed are adjusted accordingly, the number of blades is longer and the life is longer 5, the difference between the ball knife and the flying knife light knife:

Ball knife: When the concave ruler is smaller than the ball ruler, when the plane ruler is smaller than the ball R, there is no light (the bottom angle is not clear). The flying knife: The advantage is that the friends who like the machine can clean the bottom angle. : V=R*ω speed is much faster (flying knife), the things that shine out are bright, the flying knife is more used for high profile, and sometimes the flying knife does not need to be light. The disadvantage is that the concave surface size and the plane ruler are less than the diameter of the flying knife. The time is less than four. CNC cooperates with EDM processing. The practice of copper male 1. Under what circumstances does CNC precision machining need to be copper male.

CNC precision machining

    ● Do not go down to make a copper male, and there is still a copper male in a copper male. The shape is protruding and needs to be divided. ● The knife can go down, but the broken blade also needs to be a copper male. This depends on the actual situation. Depends on the situation ● The product with fire pattern needs to be made of copper ● The copper can not be made, the bone position is too thin and too high, easy to damage and deformable, deformation and spark deformation during processing, inserts are required at this time ● Copper The surface of the processed things (especially the curved surface will be very smooth and even) can overcome many problems in the fine gong and many problems in the drawing. ● When the precise shape or the amount of excess is required, it must be done.

Select the surface that needs to be a copper male, complete the surface that is to be supplemented, or extend the extended surface, to ensure that all the edges of the copper male are larger than the edges to be hit and do not hurt the surface of other products, remove unnecessary clear The plane angle (the intersection with the plane angle is the deeper glue level), fill in a regular shape, find the maximum shape of the copper male, use a boundary and then project onto the supporting surface, determine the size of the reference frame, cut off the supporting surface, here The copper public drawing is basically completed and prepared: length * width * height, length and width ≥ Ymax and Xmax as the reference frame. The actual copper material length and width must be greater than the reference frame on the drawing. Height ≥ Theoretical inch of copper male + Reference frame height + Clamping height V. Fixing of drawings 1. In the absence of a ready-made processing surface, the plane is divided into four sides, the center is to the origin, the top face is zero, and the top face is uneven ( For Tonggong), leave a margin of 0.1, that is, when the number of touches is actually 0 (z), the figure is 0.12 lower. When there are ready-made working surfaces, make the ready-made on the figure face 0 (z), The plane can be divided into the middle, otherwise the actual height, width, length and the difference of the drawings must be checked according to the actual material. In general, the size on the drawing is processed first, and then the shape on the drawing is processed. 3. When multiple positions are to be processed, the first position (standard position) must have the benchmarks of other positions, length, width and height. All gongs should be gong, and the next processing standard should be based on the previously processed surface. 4. The positioning of the insert: put it in the whole, put the bottom up to a certain height, and then the drawing will rise to this height, the plane is divided according to the whole , The height is locked with a screw according to the figure below, it is square and square, it can be divided directly into the center, and a rough point can be divided into the maximum shape, and a fixture is cut. According to the fixture, the relative position of the insert map and the fixture is determined and then The origin of the drawing is placed at the center of the fixture