Method for predicting instantaneous cutting force of milling based on maximum cutting force

A technology of instantaneous cutting force and prediction method, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of difficulty in accurately predicting the instantaneous cutting force and instantaneous maximum cutting force of milling.

Inactive Publication Date: 2017-05-17
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] In order to overcome the deficiency that the existing instantaneous cutting force prediction method is difficult to accurately predict the instantaneous cutting force and the

Method used

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  • Method for predicting instantaneous cutting force of milling based on maximum cutting force
  • Method for predicting instantaneous cutting force of milling based on maximum cutting force
  • Method for predicting instantaneous cutting force of milling based on maximum cutting force

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Embodiment Construction

[0061] refer to Figure 1-9 . The specific steps of the milling instantaneous cutting force prediction method based on the maximum cutting force of the present invention are as follows:

[0062] Step 1: Establish the instantaneous cutting force prediction equation for milling aluminum alloy 7050-T7451.

[0063] 1. Decompose the area where the milling cutter participates in cutting along the z-axis into blades placed equivalent to the rake angle of the milling cutter, and act on the tangential microelement cutting force dF of the blade on the jth tooth tj (θ), radial micro-element cutting force dF rj (θ) and axial microelement cutting force dF aj (θ), the calculation formula of micro-element cutting force is as follows:

[0064]

[0065] In the formula, j=1, 2, 3, K t is the tangential cutting force coefficient, K r is the radial cutting force coefficient, K a is the axial cutting force coefficient, t cj (θ) is the radial instantaneous cutting layer thickness at the ...

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Abstract

The invention discloses a method for predicting instantaneous cutting force of milling based on maximum cutting force, aiming at solving the technical problem that an existing instantaneous cutting force prediction method fails to predict the instantaneous cutting force and instantaneous maximum cutting force of milling accurately. The technical scheme includes that the method includes firstly, determining an upper limit and a lower limit of a cutting contact angle and cutting conditions of a jth cutter tooth of a milling cutter, and constructing a prediction equation of the instantaneous cutting force of milling with respect to cutting force parameters; obtaining the maximum cutting force under different cutting conditions through cutting experiments, and solving the cutting force coefficients so as to construct a cubic polynomial of the cutting force coefficients with respect to the cutting parameters; substituting the cubic polynomial of the cutting force coefficients into the prediction equation of the instantaneous cutting force of milling so as to obtain a prediction model of the instantaneous cutting force of milling. The method for predicting the instantaneous cutting force of milling based on the maximum cutting force has the advantage that the cubic polynomial is used for expressing complicated relations of the cutting force coefficients with respect to the cutting parameters, in which the cutting force coefficients are obtained by computing of the maximum instantaneous cutting force through the experiments, so that the instantaneous cutting force and the maximum instantaneous cutting force of milling can be predicted accurately.

Description

technical field [0001] The invention relates to a method for predicting instantaneous cutting force, in particular to a method for predicting instantaneous cutting force for milling based on maximum cutting force. Background technique [0002] The document "Chinese Invention Patent Application Publication No. CN104268343A" discloses an instantaneous cutting force prediction method for end milling. On the basis of analyzing the cutting process of end milling, this method establishes a milling instantaneous cutting force prediction equation based on the average cutting force, in which the average cutting force is expressed as the relationship between the feed per tooth and the cutting force coefficient; and then through experiments and regression analysis The method calculates the cutting force coefficient, and then establishes the quadratic polynomial of the cutting force coefficient related to the cutting speed, feed per tooth, axial depth of cut and radial depth of cut; fin...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 田锡天吕海龙张敏
Owner NORTHWESTERN POLYTECHNICAL UNIV
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