CNC Master is Processing Secrets
1、 General Principles of Knife Path
Rough cutting: Under the maximum load of the machine tool, in most cases, the largest possible tool, the largest possible feed rate, and the fastest possible feed should be selected. In the case of the same knife, the feed rate is inversely proportional to the feed amount. In general, the load of the machine tool is not a problem, and the principle of tool selection mainly depends on whether the two-dimensional angle and three-dimensional arc of the product are too small. After selecting the knife, the length of the knife should be determined. The principle is that the length of the knife should be greater than the machining depth, and for large workpieces, the interference of the chuck should be considered.
Light knife: The purpose of a light knife is to achieve the machining requirements of meeting the surface smoothness of the workpiece and reserving appropriate allowance. Similarly, for a light knife, choose the largest possible knife and the fastest possible time, as a precision knife requires a longer time, so use the most suitable feed and feed. Under the same feed rate, the larger the horizontal feed, the faster the feed rate. The amount of surface feed is related to the smoothness after machining, and the size of feed is related to the external shape of the surface. Without damaging the surface, leave the smallest margin, use the largest knife, the fastest speed, and appropriate feed rate.
2、 Clamping method
1. All clamps are horizontally long and vertically short.
2. Tiger pliers clamping: The clamping height should not be less than 10 millimeters, and the clamping height and processing height must be indicated when processing workpieces. The processing height should be about 5 millimeters higher than the plane of the vise, in order to ensure firmness and not damage the vise. This type of clamping is a general clamping, and the clamping height is also related to the size of the workpiece. The larger the workpiece, the higher the clamping height.
3. Clamping: The clamping plate is mounted on the workbench with a code, and the workpiece is locked onto the clamping plate with screws. This type of clamping is suitable for workpieces with insufficient clamping height and high processing force, generally medium and large workpieces, and has a better effect.
4. Code iron clamping: When the workpiece is large, the clamping height is not enough, and it is not allowed to lock the screw at the bottom, code iron clamping is used. This type of clamping requires secondary clamping. First, code the four corners, process the other parts, and then code the four sides and process the four corners. During secondary clamping, do not let the workpiece loosen, code first and then loosen. You can also code both sides first and process the other two sides.
5. Clamping of cutting tools: with a diameter of 10mm or more, the clamping length shall not be less than 30mm; Diameter below 10mm, clamping length not less than 20mm. The clamping of the cutting tool should be firm to prevent collision and direct insertion into the workpiece.
3、 Classification and scope of application of cutting tools
1. Classified by material:
White steel knife: easy to wear, used for rough cutting of copper and small steel materials.
Tungsten steel knife: used for corner cleaning (especially for steel materials) and smooth cutting.
Alloy knife: Similar to tungsten steel knife. ● Purple knife; Used for high-speed cutting, not easily worn out
2. Divided by blade:
Flat bottomed knife: used for flat and straight side surfaces, cleaning flat corners.
Ball knife: used for various curved surfaces with light and light knives.
Bull nose knife (with single-sided, double-sided, and five sided options): used for roughing steel materials (R0.8, R0.3, R0.5, R0.4)
Coarse skin knife: used for rough cutting, pay attention to the margin (0.3).
3. Divided by blade:
● Straight pole knife: Straight pole knife is suitable for various occasions.
Slant bar knife: but not suitable for straight surfaces and surfaces with a slope smaller than the slope of the bar.
4. Divided by blade: two blade, three blade, four blade. The more blades there are, the better the effect, but the more work done, the corresponding adjustment of speed and feed, and the longer the lifespan of the blade.
5. The difference between a ball knife and a flying knife:
Ball knife: When the concave ruler is smaller than the ball ruler and the flat ruler is smaller than the ball R, the light cannot reach (cannot clear the bottom angle).
