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Control method for workpiece machining deformation

A technology of machining deformation and control method, which is applied in the field of residual stress machining deformation control, and can solve the problems of large deformation of workpiece, high thermal aging energy consumption, and poor control.

Active Publication Date: 2019-10-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Application Information

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Problems solved by technology

Before the parts are processed, thermal aging and vibration aging are mainly used to homogenize the residual stress field and reduce the peak value of the residual stress field, so as to control the processing deformation; however, thermal aging consumes a lot of energy, and like vibration aging, there are processes that are not easy to control , the effect of stress relief is not ideal and the final deformation of the workpiece is still relatively large.

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  • Control method for workpiece machining deformation
  • Control method for workpiece machining deformation
  • Control method for workpiece machining deformation

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Embodiment Construction

[0019] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0020] see figure 1 , which is a flow chart of a method for controlling workpiece machining deformation provided in this embodiment. A method for controlling workpiece machining deformation, comprising the following steps:

[0021] S1: Obtain the deformation sensitive direction and maximum deformation position of the workpiece model to be measured through the processing deformation prediction semi-analytical model or finite element model.

[0022] S2: setting reinforcing ribs on the workpiece model to be tested, wherein the setting of the reinforcing ribs meets the following conditions:

[0023] The direction of the rib is parallel to the deformation sensitive directi...

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Abstract

The invention provides a control method for workpiece machining deformation. Reinforcing ribs conforming to a certain condition can be reserved in the primary rough machining stage, so that the bending rigidity of a workpiece is enhanced, and the machining deformation in the primary rough machining stage can be reduced to a great extent; and a middle workpiece with the reinforcing ribs reserved inthe primary rough machining stage is placed for 72 hours or above, then the stable middle workpiece is obtained, and finally the reinforced ribs reserved in the stable middle workpiece are removed through the secondary cutting; and due to the fact that the internal stress of the workpiece is fully released and material needing secondary cutting is little, large stress redistribution is avoided, so that after the reinforcing ribs are cut off, the finally obtained machined workpiece cannot generate large deformation. According to the method, carrying out secondary cutting machining by adoptingthe reserved reinforcing ribs can effectively improve the bending rigidity of the workpiece, so that the final machining deformation is reduced and the method can be used for guiding the structural design of a thin-wall weak-rigidity part.

Description

technical field [0001] The invention belongs to the technical field of residual stress processing deformation control, and in particular relates to a method for controlling workpiece processing deformation. Background technique [0002] Processing deformation is mainly caused by four factors: blank initial residual stress, clamping force, cutting force and cutting heat, and residual stress introduced by processing. Among them, the initial residual stress of blank has the greatest influence on processing deformation. Before the parts are processed, thermal aging and vibration aging are mainly used to homogenize the residual stress field and reduce the peak value of the residual stress field, so as to control the processing deformation; however, thermal aging consumes a lot of energy, and like vibration aging, there are processes that are not easy to control , The effect of stress relief is not ideal and the deformation of the final workpiece is still relatively large. Conte...

Claims

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Application Information

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IPC IPC(8): B23P13/00
CPCB23P13/00
Inventor 李变红高瀚君彭腾李科伟邓宏彬
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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