Multi-Point Location Method of Large-Scale Thin-Wall Component

doi:10.7652/xjtuxb201606019

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Multi-Point Location Method of Large-Scale Thin-Wall Component

更新时间：2025-07-09

- Multi-Point Location Method of Large-Scale Thin-Wall Component
- Vol. 50, Issue 6, Pages: 122-129(2016)
- 作者机构：
  
  1. 内蒙古科技大学机械工程学院,内蒙古,包头,014010
  2. 西安交通大学机械制造系统工程国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201606019
  CLC： TH161
- Online First：10 June 2016，
  
  Published：2016
- 稿件说明：
移动端阅览
Multi-Point Location Method of Large-Scale Thin-Wall Component[J]. 2016, 50(6): 122-129.
DOI：

Multi-Point Location Method of Large-Scale Thin-Wall Component[J]. 2016, 50(6): 122-129. DOI： 10.7652/xjtuxb201606019.

摘要

为了解析工件的加工变形与其多支承/定位点布局之间的内在关联

提出了一种新颖的多点支承/定位布局优化方法。利用有限差分方法表征加工变形敏感度的思路

建立了工件加工变形对于支承/定位点布局的解析敏感度表达式

沿减小加工变形最敏感的方向调整支承/定位点分布

可以有效抑制工件加工变形、改善工艺系统刚度。以常见的大型薄壁件的多点支承/定位为研究案例

使用提出的方法对其多支承/定位点初始布局进行了搜索

以此作为全局优化初值

并对优化后的工件加工轨迹变形计算结果进行了比对

结果表明

工件最大加工变形被控制在0.669 4 mm内

相对优化前的1.022 mm减小了34.5%

由此验证了该优化方法的正确性与合理性

并且为多支承/定位点布局优化的创新思维模式提供了理论指导。

Abstract

To analyze the relationship between workpiece machining deformation and multi-point location/support distribution

a new optimization method is proposed to amend multi-point location/support distribution. Depending on the idea of representing the sensitivities of machining deformation with finite difference method

the analytic expressions for sensitivities of machining deformation with respect to location/support distribution are established. The location/support distribution is adjusted along the most sensitive direction to restrain machining deformation and improve process system stiffness. A multi-point location of large-scale thin-wall component is taken as an example

and the searched initial distribution of location/support point is regarded as the initial value for the global optimization of multi-point location/support distribution. A comparison with non-optimized workpiece machining path deformation shows the maximum machining deformation is reduced by 34.5%

which is limited below 0.669 4 mm far less than the non-optimized value of 1.022 mm.

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Keywords

references

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