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Milling force modeling method for titanium alloy TC18 milling process

A TC18, modeling method technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem that the non-zero milling force with equal phase width of the tool cannot be effectively simulated

Inactive Publication Date: 2011-07-27
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the deficiency that the existing technology cannot effectively simulate the equi-phase width non-zero milling force that occurs during the milling process of titanium alloy TC18 with tool eccentricity when modeling the milling force of the titanium alloy TC18 milling process, the present invention provides a titanium alloy TC18 The milling force modeling method in the milling process not only considers the influence of the side edge and the bottom edge on the milling force when the side edge participates in cutting, but also considers the influence of the bottom edge on the milling force when the side edge withdraws from cutting, and establishes an instantaneous milling force prediction model. Realize the effective simulation of the equal-phase width milling force occurring in the milling process of titanium alloy TC18 with tool eccentricity, and the method also considers the size effect of the milling force coefficient

Method used

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  • Milling force modeling method for titanium alloy TC18 milling process
  • Milling force modeling method for titanium alloy TC18 milling process
  • Milling force modeling method for titanium alloy TC18 milling process

Examples

Experimental program
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Effect test

Embodiment 1

[0077] (1) Select the parameters of the end mill: the tool radius R is 6mm, the helix angle β is 37 degrees, the bottom edge inclination angle η is 3 degrees, and the number of tool teeth is N f is 4; milling method: down milling. Set the cutting parameters: the tool spindle speed is 600RPM, the single tooth feed rate is 0.0625mm / tooth, the axial cutting depth Rz is equal to 0.4mm, and the radial cutting depth Rr is equal to 2mm.

[0078] (2) Divide the milling cutter into 400 equal-height beam segments in the axial direction, and calculate the tangential milling force F acting on the j-th side edge unit on the i-th tooth at time t by the following formula T，F，i，j (t) and radial milling force F R，F，i，j (t):

[0079] f T，F，i，j (t)=K T，F，i，j h F，i，j (t)w z

[0080] f R，F，i，j (t)=K R，F，j，j h F，i，j (t)w z

[0081] In the formula, K T，F，i，j is the tangential milling force coefficient corresponding to the jth side edge unit on the ith tooth, K R，F，i，j is the radial mil...

Embodiment 2

[0130] (1) Select the parameters of the end mill: the tool radius R is 6mm, the helix angle β is 37 degrees, the bottom edge inclination angle η is 3 degrees, and the number of tool teeth is N f is 4; milling method: down milling. Set the cutting parameters: the tool spindle speed is 800RPM, the single tooth feed rate is 0.03125mm / tooth, the axial cutting depth Rz is equal to 0.4mm, and the radial cutting depth Rr is equal to 2.5mm.

[0131] (2) Divide the milling cutter into 400 equal-height beam segments in the axial direction, and calculate the tangential milling force F acting on the j-th side edge unit on the i-th tooth at time t by the following formula T，F，i，j (t) and radial milling force F R，F，i，j (t):

[0132] f T，F，i，j (t)=K T，F，i，j h F，i，j (t)w z

[0133] f R，F，i，j (t)=K R，F，i，j h F，i，j (t)w z

[0134] In the formula, K T，F，i，j is the tangential milling force coefficient corresponding to the jth side edge unit on the ith tooth, K R，F，i，j is the radial ...

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Abstract

The invention discloses a milling force modeling method for titanium alloy TC18 milling process, which is used for solving the technical problem that equal phase width non-zero milling force produced in titanium alloy TC18 milling process with cutter eccentricity can not be effectively simulated when milling force modeling for titanium alloy TC18 milling process in the prior art is carried out. In the technical scheme, the effect of a side blade and a bottom blade on milling force is considered when the side blade participates in cutting, the effect of the bottom blade on the milling force is also considered when the side blade quits cutting, and the disadvantage that the equal phase width non-zero milling force produced in titanium alloy TC18 milling process with cutter eccentricity can not be effectively simulated in the prior art is overcome; as bottom blade milling force coefficient can be expressed as exponential function of chipping width, the disadvantage that the size effect in the bottom edge cutting process can not be simulated in the prior art is overcome.

Description

technical field [0001] The invention relates to a milling force modeling method, in particular to a milling force modeling method in the milling process of titanium alloy TC18. Background technique [0002] Document 1 "Y.Altintas, Manufacturing Automation, Cambridge University Press, 2000." discloses an average milling force model considering the cutting effect of the side edge of a flat end mill. The basic modeling steps are: [0003] (1) Test the milling force by force measuring equipment, and find the average value of the measured milling force in an integer number of cycles; [0004] (2) According to the technological geometric relationship between the side edge and the workpiece, the functional relationship between the average milling force and the milling force coefficient is established through theoretical derivation; [0005] (3) Substitute the average milling force obtained in step (1) into step (2) to obtain the milling force coefficient. [0006] Document 2 "M.W...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 万敏张卫红杨昀
Owner NORTHWESTERN POLYTECHNICAL UNIV
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