Method for predicting broaching force of fir-shaped tooth profile finish broach

A prediction method, a fir tree-type technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of large errors in analytical methods and simulation methods, and achieve the effect of simple modeling process and high prediction accuracy

Inactive Publication Date: 2020-12-15
SHANGHAI JIAO TONG UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

Due to the complex tool shape and complex machining conditions in the actual broaching process, the analytical method and the simulation method have large errors in the actual broaching force prediction

Method used

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  • Method for predicting broaching force of fir-shaped tooth profile finish broach
  • Method for predicting broaching force of fir-shaped tooth profile finish broach
  • Method for predicting broaching force of fir-shaped tooth profile finish broach

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Embodiment Construction

[0024] Such as figure 1 As shown, this embodiment relates to a method for predicting the broaching force of a fir tree-shaped tooth profile finishing broach, and the specific steps include:

[0025] Step 1: Discretization of the edge of the fir tree broach curve: if figure 2 As shown, first the cutting edge is discretized into multiple single-edged micro-element tools. Combined broach by N 1 group of broaches, each group of broaches consists of N 2 segments, and each segment has a total of N 3 teeth, the tooth number is k, k=1,2,3,...,N 3 . For example, the kth tooth is discretized into microelements, and each microelement is numbered n, n=1, 2, 3,...,N.

[0026] Step 2: Establish the cutting force model of the microelement tool in the local coordinate system. In the local coordinate system of the cutting edge, according to the principle of bevel cutting, the tangential force, normal force and axial force of the discretized micro-element tool are respectively f ti , f...

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Abstract

The invention discloses a method for predicting the broaching force of a fir-shaped tooth profile finish broach, which comprises the following steps of: discretizing a fir-shaped broach curve cuttingedge, establishing an infinitesimal tool cutting force model under a local coordinate system, and converting the cutting force under the local coordinate system into a global coordinate system throughcoordinate rotation , summing the infinitesimal tool cutting forces under the global coordinate system to obtain a single-tooth cutting force, and finally establishing a multi-tooth broach dynamic broaching force model. The dynamic cutting force prediction model is used for accurately predicting the dynamic cutting force of the fir-shaped tooth profile multi-tooth finish broach according to the broach broaching force load time sequence characteristic.

Description

technical field [0001] The present invention relates to a technique in the field of mechanical processing, in particular to a method for predicting the broaching force of a fir tree-shaped tooth profile fine broach, which is used for the broaching force of a multi-tooth combined broach for processing the tenon and groove of a wheel disk of a heavy-duty gas turbine Load time series characteristic analysis and establishment of prediction model. Background technique [0002] The tongue and groove broaching of heavy-duty gas turbine compressor disks and turbine disks is a key quality control process in gas turbine manufacturing, and its processing quality directly affects the ability of the disk to withstand complex thermal alternating working loads. Considering factors such as the profile size of the tenon and groove, the broaching load, and the working stroke of the broaching machine, the tenon and groove of the wheel disk of the heavy-duty gas turbine are usually processed by...

Claims

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Application Information

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IPC IPC(8): G06F30/17G06F119/14
CPCG06F30/17G06F2119/14
Inventor 安庆龙陈杰刘志强陈明明伟伟马海善
Owner SHANGHAI JIAO TONG UNIV
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