Antifriction type deep hole drill bit

Abstract

The invention relates to an antifriction type deep hole drill bit which comprises a drill handle and a drill body. The drill body is provided with a first main chip groove and a second main chip groove, the drill body is divided into a first tool back and a second tool back by the first main chip groove and the second main chip groove, and the first main chip groove and the second main chip groove form a first spiral line and a second spiral line on the outer edge of the drill body correspondingly. A first auxiliary chip groove and a second auxiliary chip groove are formed in the first tool back and the second tool back from the end face of the drill bit downwards along the axis and are further communicated with the first main chip groove and the second main chip groove correspondingly. The first tool back and the second tool back are respectively divided into a first spiral edge belt, a second spiral edge belt, a third spiral edge belt and a fourth spiral edge belt through the first main chip groove, the second main chip groove, the first auxiliary chip groove and the second auxiliary chip groove, the edge belts are respectively provided with a plurality of antifriction grooves which are consistent in width and are arranged in a staggered mode in the axis direction, and the spiral edge belts are divided into a plurality of spiral edge blocks. The spiral blade blocks are staggered along the axis of the drill bit and are mutually overlapped. And the four rows of the chip groove structures ensure that chips are discharged more smoothly during machining.

Description

technical field [0001] The invention relates to a four-flute anti-friction deep hole drill bit, which belongs to the technical field of cutting tools. Background technique [0002] At present, cemented carbide deep hole drills have been widely used due to their extremely high processing efficiency in small and medium diameter deep hole processing processes such as automobile engines, molds, and heat exchangers. [0003] With the further improvement of processing efficiency requirements, the previous technical solutions have gradually revealed their shortcomings, mainly reflected in: 1) The cutting ability and chip removal ability of the deep hole drill do not match. 2) When the structure of the workpiece is complex, such as when there are inclined holes and cross holes, the incomplete chip shape can easily lead to chip blocking and then drill bit collapse or fracture; 3) Due to the extremely high cutting heat in deep hole machining It leads to the failure of the edge of the...

AI Technical Summary

Problems solved by technology

[0003] With the further improvement of processing efficiency requirements, the previous technical solutions have gradually revealed their shortcomings, mainly reflected in: 1) The cutting ability and chip removal ability of the deep hole drill do not match. 2) When the structure of the workpiece is complex, such as when there are inclined holes and cross holes, the incomplete chip shape can easily lead to chip blocking and then drill bit collapse or fracture; 3) Due to the extremely high cutting heat in deep hole machining Resulting in the failure of the edge of the deep hole drill bit and then the drill bit breakage; 4) Due to the diversity of workpiece grades and lack of adaptability, it cannot be generalized and standardized, and non-standard methods are often used, which is less economical

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