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Drilling tool capable of realizing low-roundness error drilling

A roundness error and drilling tool technology, which is applied in the field of drilling tools, can solve the problems of short service life of the tool, and achieve the effects of improving processing efficiency, enhancing rigidity, and reducing roundness error

Pending Publication Date: 2021-01-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the tool life is not long because the center of the drill point is too sharp

Method used

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  • Drilling tool capable of realizing low-roundness error drilling
  • Drilling tool capable of realizing low-roundness error drilling
  • Drilling tool capable of realizing low-roundness error drilling

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Embodiment Construction

[0016] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the drawings are in simplified form and are not made in exact proportions, and are only used for intuitive and visual explanation of the embodiments of the present invention.

[0017] Referring to the accompanying drawings, the present invention is a drilling tool capable of making holes with low roundness errors. It includes a shank 1 and a blade 2 connected to the shank 1. Chip flute3. The two blades and the two main flutes 3 are helically symmetrically distributed along the central axis of the drill bit. In order to solve the problem of drill centering, the force of the tool is balanced during the drilling process, and the roundness error is reduced. The two blades A parabolic chisel edge 7 is designed at the center of the front end face of the blade portion 2 . The two blade lobes form a parabolic chisel edge 7 at t...

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Abstract

The invention discloses a drilling tool capable of achieving low-roundness error drilling. The drilling tool comprises two cutting edges, a parabolic chisel edge, two arc-shaped rear tool faces, two spiral main chip grooves, two auxiliary chip grooves and three asymmetrically distributed cutting edge strips, wherein the two arc-shaped rear tool faces are located between the two cutting edges and the corresponding main chip removal grooves separately; the midpoint of the parabolic chisel edge is the vertex of the drilling tool and located on the center line of the drilling tool; a front tool face is formed at the front end of each main chip removal groove; a wedge angle is formed between each arc-shaped rear tool face and the corresponding front tool face, and the closer the arc-shaped reartool face is to the circle center, the smaller the wedge angle is; and the first cutting edge strip and the second cutting edge strip are located at two sides of one auxiliary chip groove, the firstcutting edge strip is connected with the cutting edges, and the third cutting edge strip is located at one side, connected with the cutting edges, of the other auxiliary chip groove. When metal is drilled and processed by adopting the tool, especially the metal with an inclined bottom surface is processed, the precision of the processed hole is high, the roundness error of the hole can be effectively reduced, and the excellent hole quality is provided.

Description

technical field [0001] The invention relates to a drilling tool, in particular to a drilling tool which can realize hole making with low roundness error. Background technique [0002] Drilling occupies a very important position in the manufacturing industry, up to 36% of the total machining. However, due to the complex drilling environment, it is easily affected by cutting vibration during high-speed machining, resulting in large roundness errors, "lobe holes" phenomenon, and reduced assembly accuracy. It is necessary to increase the reaming process after drilling. Therefore, the low roundness error hole making technology is one of the key links to improve assembly efficiency. [0003] In response to this problem, scholars have carried out research on related special tools. For example, the publication number CN209334784U invented by Qi Guanghua et al. is a patent named "a three-blade self-centering drill bit", which is used to obtain holes with low roundness errors. The c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/02
CPCB23B51/02
Inventor 李士鹏朱志琪秦旭达刘文韬武卫洲
Owner TIANJIN UNIV
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