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A Method for Optimizing Cutting Trajectory Parameters of Thin-walled Blades

A cutting trajectory and optimization method technology, applied in design optimization/simulation, CAD numerical modeling, manufacturing tools, etc., can solve the problem of not considering the influence of machining accuracy, etc., to improve blade accuracy, reduce average error, reduce Effects of small elastic deformation errors

Active Publication Date: 2022-03-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method only considers the trajectory optimization method of approximately rigid free-form surfaces, and does not take into account the influence of elastic deformation errors on machining accuracy during machining.

Method used

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  • A Method for Optimizing Cutting Trajectory Parameters of Thin-walled Blades
  • A Method for Optimizing Cutting Trajectory Parameters of Thin-walled Blades
  • A Method for Optimizing Cutting Trajectory Parameters of Thin-walled Blades

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Embodiment Construction

[0023] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0024] Step 1. In this embodiment, a 50×40×1mm blade is clamped at the blade root, and a corresponding finite element model is established, and the corresponding discrete points are obtained through the unit force test in the {x, y, z} direction. The deformation field in the line direction is G x,n , G y,n and G z,n , the vector form is G n =[G x,n ,G y,n ,G z,n ] T .

[0025] Step 2. According to the cutting force mechanical model, model the milling process of the ball nose cutter, and construct the cutting force and radial depth of cut a through model simulation e , forward tilt angle θ l and slip angle θ t The relationship between the parameters, the cutting force is expressed as F(a e ,θ l ,θ t ).

[0026] Step 3. Through the blade deformation field calculated by simulation and the cutting force function of the ball nose cutter, the blade proces...

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Abstract

The invention relates to a thin-wall blade cutting track parameter optimization method, which belongs to the technical field of high-quality precision manufacturing of aeroengine blades, and particularly relates to elastic deformation error modeling and cutting width parameter optimization methods of thin-wall blades, which are used to control thin-wall blades. The elastic deformation error of the blade in the CNC machining can improve the machining accuracy of the blade. In this method, through finite element simulation and mechanical cutting force modeling, the deformation field of the thin-walled blade during the machining process and the milling force model of the ball-end cutter are constructed, and an elastic deformation error model is built on this basis. The model is used to recalculate the cutting width of the original cutting trajectory, and plan the optimized trajectory. The accuracy of blades processed by this trajectory has been significantly improved.

Description

technical field [0001] The invention belongs to the technical field of high-quality precision manufacturing of aero-engine blades, and in particular relates to an elastic deformation error modeling and cutting width parameter optimization method of a thin-walled blade, which is used to control the elastic deformation error generated by a thin-walled blade in numerical control machining, thereby Improve the machining accuracy of the blade. Background technique [0002] Thin-walled blade parts are key parts in aero-engines, gas turbines and other equipment, which are difficult to process due to their complex shape and large processing deformation. In particular, the coupling of the weak stiffness characteristics caused by the thin-walled structure and the cutting force during machining makes it difficult to guarantee the final machining accuracy. [0003] Patent CN201711103056.X discloses a processing optimization method for thin-walled parts based on finite element analysis,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/23B23C3/00B23Q3/06G06F111/10
CPCB23C3/00B23Q3/062
Inventor 张莹侯尧华张定华吴宝海
Owner NORTHWESTERN POLYTECHNICAL UNIV