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Deformation compensation method for machining arc-shaped parts

A technology of deformation compensation and deformation compensation, applied in the field of deformation compensation, can solve the problems of stress and incompatibility of arc-shaped parts, and achieve the effects of prolonging service life, simple and easy operation, and practical prediction and control

Inactive Publication Date: 2014-05-07
AVIC GUIZHOU AIRPLANE
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Problems solved by technology

In this way, although qualified measurement data can be obtained, in fact, the shape has rebounded and deformed during the finishing of the inner shape, and the final part shape is different from the required arc shape. Stress will be generated when deformed arc parts will generate stress, even uncoordinated

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  • Deformation compensation method for machining arc-shaped parts
  • Deformation compensation method for machining arc-shaped parts
  • Deformation compensation method for machining arc-shaped parts

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings. The specific embodiment is only for expressing the technical solution more clearly, and is not used to limit the technical solution.

[0025] figure 1 According to the force analysis, it can be seen that the deformation direction 2 in the middle of the arc-shaped part points to the inside of the arc-shaped part, that is, the deformation occurs downward in the figure; the deformation direction 4 at the end of the arc-shaped part points to the outside of the arc-shaped part, that is, figure 1 Deformation occurs in the middle and upward.

[0026] figure 1 The principle of subsection processing is also shown in the figure. The subsection line 1 divides the arc into 5 sections. When measuring, counting, and calculating the deformation compensation value, 5 points should be measured correspondingly. If it is divided into 5 sections, but only the deformation values ​​of th...

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Abstract

The invention discloses a deformation compensation method for machining arc-shaped parts and relates to the field of numerical control machining. The method includes the following steps that A, deformation numerical values are measured; B, statistics is performed on the deformation values; C, deformation compensation numerical values are calculated; D, rough machining is performed; E, a beam is additionally installed; F, numerical control machining numerical values are set; H, finish machining is performed on outer shapes; I, finish machining is performed on inner shapes; J, the beam is disassembled. Deformation directions and the deformation numerical values are estimated in advance, then in the process of numerical control machining, the deformation quantity is set apart, so that after machining, deformation is inevitably generated, the deformed arc-shaped parts just meet the size requirements of the arc-shaped parts, stress is not generated any more in the assembly process, and therefore the service life of the arc-shaped part can be effectively prolonged. The method is easy and convenient to operate. In addition, parameters are very convenient and rapid to adjust if in need, and the deformation compensation method has very practical value in the aspects of predicating and controlling the arc-shaped parts in the numerical machining process.

Description

technical field [0001] The invention relates to the field of numerical control machining, in particular to a deformation compensation method used in numerical control machining of arc-shaped parts. Background technique [0002] arcs (see figure 2 ) is a common type of overall structural parts in the production of aircraft and automobile parts. Due to its complex structure and poor rigidity, the parts are easily deformed under the cutting force of the CNC machine tool, and the machining accuracy of the parts cannot be guaranteed. For example, the arc-shaped parts connected to the canopy in a certain type of aircraft require double-sided processing during the forming process, and the deformation is relatively large during CNC machining. The blank of the part is a casting, and its material is cast aluminum, which has a low melting point and cannot be heated The calibration method corrects and removes the processing stress. In the prior art, it is difficult to process such part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q17/20B23D79/00G06F19/00
CPCB23P13/02B23Q17/20
Inventor 卢永
Owner AVIC GUIZHOU AIRPLANE
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