A precision milling cutter

Abstract

The invention discloses a precision milling cutter and a processing method thereof. The milling cutter comprises a cutter body and a plurality of cutter teeth at the periphery of the cutter body, wherein a flat section is arranged between every two cutter teeth to form a flat bottom surface on the bottom of a spiral groove between the two cutter teeth, the flat bottom surfaces and the spiral grooves are arranged on the cutter body according to the same helical angle, and all points on the flat bottom surfaces are equally far away from an axis of the milling cutter. According to the precision milling cutter, by virtue of the flat sections, the distance between every two cutter teeth increases, so that a chip removal space of the milling cutter is enlarged, and chips can be discharged smoothly. By virtue of the flat sections, the distance between every two cutter teeth increases, so that rake angles of cutting edges can be large to allow the cutting edges to be sharp, while back angles of the cutting edges can be reduced correspondingly to ensure the thickness of the cutter teeth so as to avoid tooth breakage. Moreover, by virtue of the flat sections, the bottoms of the spiral grooves are flattened, so that the core diameter of the milling cutter can be enlarged to improve the strength of the milling cutter, and further, the rate of cutter breakage can be lowered.

Description

technical field [0001] The invention relates to the field of processing tools, more specifically, to a precision milling cutter and a processing method thereof. Background technique [0002] Precision milling cutters are generally used for precision machining and manufacturing of various parts, and their machining accuracy is generally high. Taking the processing of PCB as an example, the PCB milling cutter is a cutting tool in the process of milling the shape (forming). [0003] Such as figure 1 and figure 2 As shown, taking the multi-blade chipbreaker milling cutter produced and used at home and abroad as an example, the multi-blade chipbreaker milling cutter includes: a cutter body 100 and cutter teeth 110 arranged on the periphery of the cutter body, and the cutter teeth 110 The space between them is a spiral groove 180, wherein the cutter tooth 110 includes a cutting edge 111, a rake surface 112 and a flank surface 114, and the rake surface 112 and the flank surface...

AI Technical Summary

Problems solved by technology

After determining the number of teeth 110 or blade 111, as figure 1 and figure 2 As shown, in order to ensure the sharpness of the tool, the rake angle 112 angle γ must be determined, but in this case, the rear angle α, the chip removal space (and the spiral groove 180) and the core diameter are restricted and cannot be freely adjusted

Therefore, this kind of milling cutter has a small chip removal space, the cutting edge is not sharp enough, and the core diameter is limited by the design of the grinding wheel 10, so that the milling cutter is prone to breakage during the milling process, resulting in a short life of the milling cutter, thereby increasing Processing costs and reduced processing efficiency

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