Analyzing and modelling method of milling force of flat spiral end milling cutter

A modeling method and end mill technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as time-consuming calculation process, unfavorable cutting mechanism research, and difficulty in mesh production

Inactive Publication Date: 2017-11-07
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

But its existing problems are: the calculation process is time-consuming; the production of the grid is quite difficult and time-consuming; the core algorithm is difficult to master and modify for the general, which is not conducive to in-depth research on the cutting mechanism
Existing modeling methods are time-consuming and require cumbersome calibration for various cutting conditions and tool / workpiece combinations

Method used

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  • Analyzing and modelling method of milling force of flat spiral end milling cutter
  • Analyzing and modelling method of milling force of flat spiral end milling cutter
  • Analyzing and modelling method of milling force of flat spiral end milling cutter

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Embodiment Construction

[0050] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used for Limit the invention.

[0051] An analytical modeling method for milling force of a flat-bottomed spiral end mill includes the following steps:

[0052] Step 1. Determine the geometric parameters of the flat-bottomed spiral end mill: the diameter of the milling cutter D, the unit is mm; the number of teeth N t , The unit is tooth; helix angle i 0 , The unit is deg; the rake angle of the tool α r , The unit is deg; selected cutting parameter: spindle speed n r , The unit is rpm; the feed per tooth f t , The unit is mm / z; radial cutting width d r , The unit is mm; the axial depth of cut a p , The unit is mm;

[0053] Step...

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Abstract

The invention relates to an analyzing and modelling method of milling force of a flat spiral end milling cutter. According to the method, workpiece material characteristics, cutter geometry, cutting conditions and milling modes serve as model input parameters, consideration is given to the influence on the cutting force by a cutter cutting edge radius, a variable sliding friction coefficient and cutter bounce, shear flow stress is calculated through a Johnson-Cook constitutive model in a model, each cutting edge of the milling cutter is scattered into multiple microelements in the cutter axis direction, the cutting characteristic of each microelement is equivalent to an inclined cutting process, cutting force exerted on each cutting microelement is obtained through an analytical model of inclined cutting force, then cutting force of all the cutting microelement is superposed, and a milling force value of the milling cutter is obtained. According to the analyzing and modelling method of the milling force of the flat spiral end milling cutter, cutting mechanism, relevant stress, strain and a strain rate in the cutting process and the distribution situation of the temperature can be reflected truly, the milling force can be quickly predicted only by inputting the cutting conditions and workpiece characteristic parameters, and the method is high in accuracy and rapidity.

Description

Technical field [0001] The invention relates to a numerical control processing technology, in particular to a milling force analytical modeling method of a flat-bottomed spiral end mill. Background technique [0002] Milling force is one of the important physical quantities that characterize the characteristics of the cutting process. By modeling and simulating the milling force, it is possible to predict in advance the possible overload and deformation during machining. Precise milling force prediction can optimize machining stability and cutting parameters. , Error compensation and control, and part surface integrity are of great significance. [0003] The main methods of milling force modeling are: empirical method, mechanical method, and numerical method. The empirical method mainly uses a large amount of cutting experiment data, through the theory of probability statistics and regression analysis, and applies the orthogonal regression test of these cutting parameters to fit t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 付中涛陈绪兵戴耀南毛金城
Owner WUHAN INSTITUTE OF TECHNOLOGY
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