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Hex-blade conical ball milling cutter used for machining impeller deep hole

A ball milling cutter and deep hole technology, which is applied to milling cutters, metal processing equipment, manufacturing tools, etc., can solve problems such as difficulty in securing the ball head of the cutter, affecting product development progress, and prolonging the total cycle of blisks. The effect of labor cost, regrind frequency increase and regrind pass rate improvement

Inactive Publication Date: 2013-06-19
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the integral impeller, the blade surface is a complex free-form surface, and the requirements for the size of the blade part, line profile, blade waviness, and surface roughness are relatively high, which results in the prolongation of the overall blade disc addition period and affects the product development progress.
[0004] At present, the standard four-blade solid carbide straight shank ball end milling cutter is mostly used for the fine milling of the integral impeller blade. The blade surface is a space free curved surface with a relatively complicated shape. Point-to-point milling is used. On the premise that the cutting line speed of a certain material is constant, in order to ensure the quality of the machined surface, the feed rate per tooth of the tool should not be too large (Fz=0.05~0.1mm), while the precision Most general-purpose milling tools have four cutting edges, and it is difficult to improve the processing efficiency. That is, the traditional tool structure limits F processing efficiency, and it is difficult to guarantee the radius R of the tool ball during the regrinding process after wear, resulting in regrinding costs. improvement

Method used

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  • Hex-blade conical ball milling cutter used for machining impeller deep hole
  • Hex-blade conical ball milling cutter used for machining impeller deep hole
  • Hex-blade conical ball milling cutter used for machining impeller deep hole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A six-edged conical ball milling cutter for impeller deep hole machining, which is composed of a coaxial and integral tool handle 1, a tool bar 2, and a cutting edge 3 arranged at the front end of the tool bar 2; it meets the following requirements:

[0038] The six-edged conical ball milling cutter for impeller deep hole machining requires the following:

[0039] When the diameter of the tool is 10mm, the size of the handle 1 is 16mm; when the diameter of the tool is 16mm, the size of the handle 1 is 20mm;

[0040] The shank 1 taper of the tool is 4°;

[0041] The rake angle of the cutter is 5°, the relief angle is 2°, the helix angle is 20°, the blade width is 0.2mm, and the effective length of the cutter head is 35mm.

[0042] Taking a typical large axial-flow integral impeller made of titanium alloy as an example, without reducing the feed rate per tooth of the tool, two cutting edges are added to increase the processing feed rate and the processing efficiency is i...

Embodiment 2

[0092] The content of this embodiment is basically the same as that of Embodiment 1, the difference is that:

[0093] The six-edged conical ball milling cutter for deep hole machining of the impeller is used for fine milling of the casing cavity of the high-temperature alloy casing. Because it is a difficult-to-machine material, the material has high hardness, high viscosity, poor thermal conductivity, and processing variability; The parts are specifically GH4169 nickel-based superalloy, the processing part is the cavity wall of the casing shell, and the transfer radius is 5mm. After rough milling and semi-finishing, the machining allowance is 0.3mm.

[0094] In the finishing milling process, a six-edged milling cutter is used to remove the remaining 0.3mm allowance. The parameters of the finishing milling process require:

[0095] Tool diameter 10mm; blade number Z=6; maximum aspect ratio 1.5×D; depth of cut A p =0.3mm, cutting line speed V c =70m / min; Feed per tooth F z =...

Embodiment 3

[0098] The content of this embodiment is basically the same as that of Embodiment 1, the difference is that:

[0099] The six-edged conical ball milling cutter for deep hole machining of the impeller is used for finish milling of the stainless steel casing. , The machining allowance is 0.3mm.

[0100] In the finishing milling process, a six-edged milling cutter is used to remove the remaining 0.3mm allowance. The parameters of the finishing milling process require:

[0101] Tool diameter 10mm; blade number Z=6; maximum aspect ratio 1.5×D; depth of cut A p =0.5mm, cutting speed V c =140m / min; feed per tooth F z =0.1mm; speed n=4500RPM; feed F=2700mm / min.

[0102]

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Abstract

The invention discloses a hex-blade conical ball milling cutter used for machining an impeller deep hole. The hex-blade conical ball milling cutter is composed of a cutter handle (1), a cutter pole (2) and cutting edges (3) disposed at the front end of the cutter pole (2). The hex-blade conical ball milling is characterized in that diameter of the cutter is within the range of 8-16mm, six cutting edges are disposed on the cutter; length of each cutting edge is 15-80mm, valid length of each cutter head is 20-60mm; the cutter handle (1) of the cutter is of a conical-handle structure, conical degree is between 1.5 DEG C and 6.5 DEG C; and cutting line speed Vc of the cutter is 60-200m / min. By means of the hex-blade conical ball milling cutter, efficiency and quality of deep hole machining are improved. As the machining efficiency and machining quality are improved, work time of equipment is reduced, depreciation of equipment is reduced, and labor cost is reduced.

Description

[0001] technical field [0002] The invention relates to the technical field of impeller processing, and in particular provides a six-edged conical ball milling cutter for impeller deep hole processing. Background technique [0003] Integral impeller processing technology is one of the key technologies of advanced aero-engines. Due to the limitations of special processing technology on material properties and processing accuracy requirements, mechanical processing is still the most widely used processing method. The blade profile of the integral impeller is a complex free-form surface, and the requirements for the blade part size, linear profile, blade waviness, and surface roughness are relatively high, which results in the prolongation of the overall blade disc addition cycle and affects the product development progress. . [0004] At present, the standard four-blade solid carbide straight shank ball end milling cutter is mostly used for the fine milling of the integral i...

Claims

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Application Information

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IPC IPC(8): B23C5/10
Inventor 张积瑜师俊东张春华李丹
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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