Bionic texture and coating layer cooperated anti-friction cutter and design method thereof

A biomimetic texture and synergistic technology, applied in the field of mechanical cutting tools, can solve problems such as weakening the cooling and lubrication effect, and achieve the effects of small internal stress, improved lubrication performance and friction performance, and uniform stress distribution.

Active Publication Date: 2019-08-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the cutting process, the traditional tool-chip contact interface is in a tight bite state, and it is difficult for the externally supplied lubricating medium to enter the tool-chip interface to play a role, thus greatly weakening the cooling and lubrication effect

Method used

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  • Bionic texture and coating layer cooperated anti-friction cutter and design method thereof
  • Bionic texture and coating layer cooperated anti-friction cutter and design method thereof

Examples

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Effect test

example 1

[0016] A bionic texture and coating synergistic anti-friction tool, the tool base material is cemented carbide, the tool base material rake face cutter-chip contact area has a composite texture of bionic circular hole-shaped micro-pits and cylindrical micro-protrusions , the depth of the micro-pit texture gradually decreases away from the tool tip, and the height of the micro-protrusion texture gradually increases away from the tool tip; the texture and the surface of the substrate have AlZrTaC+TiVBN alternately distributed nano-layered coatings, and alternate layered coatings The layer contains 20 layers of AlZrTaC and 20 layers of TiVBN single layer, and the thickness of the single layer of AlZrTaC and TiVBN is 50nm.

[0017] The bionic texture and coating synergistically reduce friction tool, and its design method is as follows:

[0018] (1) Under the condition of water-based cutting fluid lubrication, according to the contact state of the tool-chip contact interface and th...

example 2

[0022] A bionic texture and coating synergistic anti-friction tool, the tool base material is cemented carbide, and the tool-chip contact area on the rake face of the tool base material has a composite texture of bionic triangular micro-pit and quadrilateral micro-protrusion, micro-concave The depth of the pit texture gradually decreases away from the knife tip, and the height of the micro-protrusion texture gradually increases away from the knife tip; the texture and the surface of the substrate have AlZrTaC+TiVBN nano-layered coatings alternately distributed, and the alternate layered coatings contain 10 A single layer of AlZrTaC and 10 layers of TiVBN, and the thickness of a single layer of AlZrTaC and TiVBN increases sequentially from the substrate to the outside.

[0023] The bionic texture and coating synergistically reduce friction tool, and its design method is as follows:

[0024] (1) Under the condition of oil-based cutting fluid lubrication, according to the contact...

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Abstract

The invention discloses a bionic texture and coating layer cooperated anti-friction cutter and a design method thereof. The cutter adopts a basal body material of high-speed steel, hard alloys or ceramic; a bionic micro pit and micro projection composite texture is arranged in a cutter-chip contact area on the front cutter surface of the basal body material of the cutter; AlZrTaC+TiVBN alternate-distributed nanometer laminate coating layers are arranged on the surfaces of the texture and a basal body; the alternate laminate coating layers at least comprise single layers of 10 AlZrTaC layers and 10 TiVBN layers; and the thickness of the single layers of AlZrTaC and TiVBN is not bigger than100 nm. The design method of the cutter comprises the following steps: a design model of a micro texture on the surface of the cutter-chip contact area on the front cutter surface of the cutter is built; the oil film pressure and the friction coefficients of the cutter-chip contact interface are analyzed based on a Reynolds equation to optimize the geometric size of the micro texture and the depth or height gradual change dip angles theta 1 and theta 2; and through physical compatibility and chemical compatibility analysis, a laminate structural form of AlZrTaC+TiVBN coating layers is built. The cutter synthesizes the characteristics of the micro texture and the nanometer laminate coating layers, can reduce the friction and the wear of the cutter in the lubricating liquid cutting process, and can be widely applied to the cutting in the cutting liquid mode.

Description

technical field [0001] The invention belongs to the technical field of mechanical cutting tools, and relates to a bionic texture and coating synergistic anti-friction tool and a design method thereof. Background technique [0002] During the metal cutting process, there is a large friction between the tool and the workpiece, resulting in serious tool wear. Reasonable use of cutting fluid can improve the friction of the contact interface during the metal cutting process, reduce the bonding between the tool and chips, and thus improve the tool life. However, during the cutting process, the traditional tool-chip contact interface is in a tight bite state, and it is difficult for the externally supplied lubricating medium to enter the tool-chip interface to play a role, thus greatly weakening the cooling and lubrication effect. In recent years, the research results of tribology and bionics have shown that the insertion of functional texture can make the cutting fluid penetrate i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/00G06F17/50
CPCB23B27/00B23B2226/27G06F30/23
Inventor 邢佑强李想黄开靓吴泽刘磊
Owner SOUTHEAST UNIV
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