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Turning machining parameter optimization method considering uncertain parameters,

A technology of processing parameters and optimization methods, applied in the fields of electrical digital data processing, design optimization/simulation, special data processing applications, etc.

Inactive Publication Date: 2017-12-15
NORTHEASTERN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] In the use of the above method, the turning parameters are considered to be deterministic. However, due to the influence of load and environmental conditions, the turning parameters are random in actual engineering, so the above research has certain limitations.

Method used

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  • Turning machining parameter optimization method considering uncertain parameters,
  • Turning machining parameter optimization method considering uncertain parameters,
  • Turning machining parameter optimization method considering uncertain parameters,

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0216] Table 1 shows the design variable parameters and probability distribution characteristics of random parameters of a CNC lathe.

[0217] Table 1 Probability distribution characteristics of basic parameters

[0218]

[0219] Put the above turning dynamic parameters into the above formulas (6), (7), and (8), and different speed Ω corresponds to different limit cutting depth aplim, and the turning stability lobe diagram is obtained, as shown in Figure 4 shown. The curve divides the space into two parts, the unstable area and the stable area. If the value point is above the curve, there will be flutter phenomenon, and the point on the lobe curve is a critical state.

[0220] Apply the SORA method in step 05 to solve the reliability optimization problem. The objective function of this example is nonlinear. In the programming optimization, the MATLAB programming language can be used, and the above deterministic optimization and the deterministic optimization in the relia...

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Abstract

The invention provides a turning machining parameter optimization method considering uncertain parameters. The method comprises the steps of obtaining a stability limit-state function according to preset initial vibration conditions and stability critical-state information of a turning machining system; adopting an AFOSM to obtain reliability indexes for evaluating the stability of the system; with MRR as preset constraint conditions of an optimization target, ,establishing an optimization model of the reliability of turning process parameters in the system, wherein the constraint conditions comprise reliability constraint conditions and stochastic design variable boundary constraint conditions; optimizing and processing the optimization model, and obtaining a target function value which is optimized and converged and meets the reliability constraint conditions, wherein certainty parameters, stochastic design variables and stochastic parameters which correspond to the target function value serve as output turning machining parameters. According to the method, the reliability can serve as an evaluation index and optimization condition, and the influences of uncertain factors on the turning process are analyzed in order to obtain the best turning machining parameters.

Description

technical field [0001] The invention relates to a turning processing parameter optimization technology, in particular to a turning processing parameter optimization method considering uncertain parameters. Background technique [0002] High-speed and high-precision machining is the development trend of modern manufacturing, and the prerequisite for realizing high-performance cutting is stable cutting. Regenerative chatter during turning seriously affects the machining efficiency, precision and tool life of the machine tool. Therefore, the turning chatter factor must be considered in the optimization of turning processing parameters. [0003] Regenerative flutter is considered to be the most widely studied mechanism. In recent years, scholars at home and abroad have proposed various methods to avoid regenerative chatter and optimize turning parameters. People in the industry have proposed the application of variable parameters such as variable speed and inclination to supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 黄贤振胡明伟张义民李常有朱丽莎
Owner NORTHEASTERN UNIV
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