Four-edge end mill having cooling holes and variable spiral unequal tooth pitch

Abstract

The invention discloses a four-edge end mill having cooling holes and the variable spiral unequal tooth pitch. The four-edge end mill comprises a main body of the end mill, a shank part and a millingpart at one end of a shank; four cooling liquid supply holes are formed inside the main body of the end mill; and the milling part at one end of the shank comprises four side cutting edges arranged onthe cylindrical surface of the milling part and four bottom cutting edges arranged on the end surface. The side cutting edges of the end mill adopt the variable spiral angle structures, the bottom cutting edges adopt the arc-shaped structures, the unequal tooth pitch structure is adopted between every two adjacent end tooth edges, and a spiral chip removal groove is formed between each bottom cutting edge and the adjacent side cutting edge. According to the end mill, the edge chipping resistance and the wear resistance of the tool are improved, then the service life of the tool is prolonged,vibration of the tool is reduced during machining, the tool cooling speed is increased, the milling heat and the milling force during machining are reduced, the surface quality of workpieces is improved, and the chip removal effect is obvious.

Description

technical field [0001] The invention relates to the field of machining tool design, in particular to a four-edged end mill with cooling holes and variable helix pitches. Background technique [0002] Milling cutters are one of the most important tools in processing and production, and the development of society now puts forward new requirements for milling cutters. When processing titanium alloy materials, the helix angle of traditional end mills is a fixed value. During the reprocessing process, the workpiece is struck at a fixed frequency, which causes the workpiece to vibrate due to resonance during processing, resulting in a larger tool. The vibration caused by the tool is damaged, and the quality of the processed surface is low, which in turn affects the quality of the processed product. [0003] In the milling process, the durability of the tool and the surface quality of the workpiece are directly related to the structure of the milling cutter. When the front end of...

AI Technical Summary

Problems solved by technology

Therefore, the size of the chip discharge cavity that discharges chips through the center groove has to be limited, and chip clogging may easily occur in the center groove

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