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Knife tool chip breaker

A chip breaker and tool technology, which is applied in the direction of tools for lathes, manufacturing tools, accessories of tool holders, etc., can solve the problems of material plasticity and elasticity, which are difficult to break chips.

Inactive Publication Date: 2008-12-17
DALIAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a tool chip breaker, which provides reasonable geometric parameters of the tool chip breaker, aiming at solving the technical problem that the plasticity and elasticity of the material are relatively large and difficult to break chips in the process of automatic machining of thin cutting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] When the cutting thickness ac is less than or equal to 0.15 mm, the length of the first rake face 1 is 0.1 mm to 0.15 mm, and the rake angle of the first rake face 1 is γ 1 Take minus 5 degrees to zero degrees. The length of the second rake face 2 is not greater than one time of the cutting depth.

[0043] Let E=2000kgf / mm 2 , σ S =62.5kgf / mm 2 ~65kgf / mm 2 , ε b =0.0063, B=720, η=04~0.5, calculate the radius of curvature ρ of the circular arc chip flute 3 in the rear section according to the formula (2) H =1.8mm~2.3mm; at this time, the chip length is 50mm~100mm, and the chip breaking effect is good;

Embodiment 2

[0045] When the cutting thickness ac is greater than or equal to 0.15mm but less than 0.25mm, the length of the first rake face 1 is 0.15mm, and the rake angle of the first rake face 1 is γ 1 Take 0 degrees to 5 degrees. The length of the second rake face 2 is not greater than twice the cutting depth.

[0046] Let E=2000kgf / mm 2 , σ S =62.5kgf / mm 2 ~65kgf / mm 2 , ε b =0.0063, B=720, η=04~0.5, calculate the radius of curvature ρ of the circular arc chip flute 3 in the rear section according to the formula (2) H =2.0mm~3.0mm; at this time, the chip length is 40mm~110mm, and the chip breaking effect is good.

Embodiment 3

[0048] When the cutting thickness ac is greater than or equal to 0.25 mm, the length of the first rake face 1 is taken as 0.2 mm, and the rake angle of the first rake face 1 is γ 1 Take 0 degrees to 5 degrees. The length of the second rake face 2 is not more than three times the cutting depth.

[0049] Let E=2000kgf / mm 2 , σ S =62.5kgf / mm 2 ~65kgf / mm 2 , ε b =0.0063, B=720, η=04~0.5, calculate the radius of curvature ρ of the circular arc chip flute 3 in the rear section according to the formula (2) H =2.8mm~4.1mm; at this time, the chip length is 60mm~120mm, and the chip breaking effect is good.

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Abstract

The invention discloses a tool chip breaker, solving the problems of difficult chip breaking caused by great material plasticity and elasticity in the process of automatic processing and thin-cutting. The key of the invention is that a section of major first face and a first front angle are added in the cutting edge of a linear arc-shaped chip breaker, and the back of the major first face is a major second face; according to the parameters of cutting thickness, the major first face and the major second face, the corresponding curvature radius of an arc chip reeling slot is calculated. The tool chip breaker has the advantages that: as a section of the linear major first face is added in the cutting edge, the curvature radius of the arc chip reeling slot is reasonable, the chip deformation is increased, the effect of chip reeling and breaking is improved; the angle of the cutting edge is increased, the strength of the cutting edge is strengthened and the cutting depth is deepened; the new structure ensures that the chip goes into the chip reeling slot more smoothly.

Description

technical field [0001] The invention relates to a tool structure for machining, in particular to a tool chip breaker. Background technique [0002] In metal cutting, the development trend is to increase the metal removal rate under the condition of high automation and unmanned participation, which requires a very reliable cutting process, but if the problem of chip control is not solved well, it will greatly affect advanced Equipment performance. In the cutting process, the broken chips will splash and hurt people, and easily damage the machine tool; while the long strip-shaped chips will wrap around the workpiece or the tool, which is easy to scratch the workpiece, cause tool damage, and even affect the safety of workers. For automatic processing machine tools such as CNC machine tools (machining centers), due to the large number of tools and the close relationship between the tool holder and the tools, the problem of chip breaking is even more important. As long as one of...

Claims

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Application Information

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IPC IPC(8): B23B27/22
Inventor 甄恒洲
Owner DALIAN UNIVERSITY
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