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Method of determining the conditions of a phase for machining a workpiece with modulated cutting rate

A technology for adjusting the cutting speed and cutting speed. It is used in the attachment of tool holders, metal processing equipment, manufacturing tools, etc., and can solve problems such as time loss and workpiece waste.

Active Publication Date: 2011-07-27
SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
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Problems solved by technology

This means that when preparing the step plan for machining the individual workpieces, several tests need to be carried out, resulting in a considerable loss of time and the scrapping of a large number of workpieces made of precious alloys

Method used

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  • Method of determining the conditions of a phase for machining a workpiece with modulated cutting rate
  • Method of determining the conditions of a phase for machining a workpiece with modulated cutting rate
  • Method of determining the conditions of a phase for machining a workpiece with modulated cutting rate

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Embodiment Construction

[0008] The attached figure depicts the simulated machining process. Assume that a machining operation is performed within a predetermined time T. Assume that T is a time interval within the predetermined time T. The smaller the value chosen for T, the more calculations need to be performed, but this allows an accurate description of the phenomenon and the shape of the part, including the state of the surface at the end of a machining operation. The machining operation is a machining phase in which the tool is continuously held in engagement with the material of the workpiece.

[0009] In addition, a variety of models can be used to represent the artifacts and components that make up the system in computer form, and to describe the interactions of the various artifacts and components with each other. Most models describing the mechanical behavior of workpieces and assemblies are made using the so-called "finite element" method. Artifacts or components are represented by grou...

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Abstract

Determining the machining conditions of a workpiece to avoid the onset of vibration during this machining. According to the invention, the machining phase is simulated (10) by temporarily setting the parameters of a cutting rate modulation function, from this the corresponding surface condition is deduced and the said parameters are modified iteratively, each time simulating the machining phase until the surface finish reaches an admissible value, then the machining phase is performed varying the cutting rate (Omega(t)) according to the corresponding modulation function.

Description

technical field [0001] The present invention generally relates to a method that makes it possible to determine the machining conditions of a workpiece that vibrates during machining. The object of the invention is to determine the cutting conditions, especially the cutting speed, so as to avoid such vibrations. Background technique [0002] Some large workpieces, such as the rotor disks of turbines, have a bell shape and relatively thin walls, and these workpieces are prone to vibration during machining. [0003] Tools already exist for simulating vibration during machining, and these tools can in some cases predict vibration problems while turning or milling these components. However, these tool simulations are usually based on frequency methods which are only suitable for studying systems with constant turning speeds. However, in order to avoid resonances of such workpieces, it is preferable to vary the rotational speed (turning or milling speed) periodically to prevent ...

Claims

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Application Information

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IPC IPC(8): G05B19/4069
CPCG05B19/4069G05B2219/41256Y10T82/10
Inventor 杰拉德·康菲格诺飞利浦·罗荣亚历克西斯·佩雷斯-杜阿尔特
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
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