Blade for milling and its supporting milling cutter

Abstract

The invention discloses a blade for milling and a matched milling cutter of the blade. The blade comprises a bottom surface, a top surface, side faces, a cutting edge part, a knife point part, a blade through hole and grooves, wherein the side faces and the top surface intersect to form the cutting edge part and the knife point part, the grooves are formed in the cutting edge part below the cutting edge part, the grooves are respectively of a triangular pyramid shape, a bottom opening of each groove is located in the bottom surface of the blade, and the conic node of each groove is located at the position close to the cutting edge part. The matched milling cutter comprises a milling cutter shank part and a milling cutter end part used for removing scraps; the milling cutter end part comprises two cutter groove bases, the blade installed on the cutter groove bases and screws; each cutter groove base comprises a bottom surface, a threaded hole and a side surface, wherein the side surface is provided with protrusions matched with the grooves of the blade. The blade does not need special custom-made machining equipment and is easy to machine and low in manufacturing cost; the matched milling cutter ensures that the blade and the matched milling cutter are positioned firmly in the operation process and lowers the risk that excessive stress on the screws causes excessive flexure which gives rise to fractures.

Description

technical field [0001] The invention relates to a milling cutter, in particular to an indexable milling insert and a matching milling cutter for workpiece contour processing. Background technique [0002] Ball end milling tools that usually process curved surface profiles are subjected to complex cutting forces during processing, and often vibrate violently when processing deep concave cavities or corners. This variable and complex cutting force and severe vibration will cause the positioning of the insert and the milling cutter to change, resulting in the rotation of the insert or the bending and deformation of the screw clamping the insert, and sometimes even the screw breaking and the insert flying out. Therefore, how to make such inserts firmly positioned in the milling cutter body is very important. [0003] The authorized announcement number is CN1761547B, and the Chinese invention patent with the authorized announcement date of January 9, 2013 discloses a milling cut...

AI Technical Summary

Problems solved by technology

However, there are many uncertain factors in this processing method, such as the complex shape of the cutting blade, uneven pressing density, uneven atmosphere in the sintering furnace, etc. After sintering, the groove on the bottom surface of the cutting blade is often deformed, especially for complex shapes. For cutting inserts, the deformation of the groove will be particularly serious, so that the positioning stability of the cutting insert and the milling cutter cannot be guaranteed when the central screw is overstressed, thereby increasing the risk of damage to the cutting insert; the second processing method is sintering first Post-processing: first keep the bottom surface of the cutting insert flat, and then sinter the cutting insert to form a groove on the bottom surface of the cutting insert. High difficulty, general grinding equipment can not process it, need to use special electric machining or other equipment, the processing efficiency is low, thus increasing the manufacturing cost of cutting blades

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