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A vibration-assisted aircraft skin stretch forming and rebound suppression device and process

An aircraft skin and stretch forming technology, applied in the field of stamping forming, can solve the problems of poor vibration effect, and achieve the effect of restraining springback, fully deforming the sheet and avoiding springback.

Inactive Publication Date: 2018-11-06
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During this process, it is likely that part of the rebound phenomenon has already occurred, which makes the vibration effect worse

Method used

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  • A vibration-assisted aircraft skin stretch forming and rebound suppression device and process
  • A vibration-assisted aircraft skin stretch forming and rebound suppression device and process
  • A vibration-assisted aircraft skin stretch forming and rebound suppression device and process

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Embodiment Construction

[0034] In this embodiment, a vibration-assisted aircraft skin stretch forming and rebound suppression device includes: a mold 2, a vibrator 3, an elastic pad 4, a stretching device 5, a workbench 6, and a fixing member 7 Different from traditional integral stretch forming equipment, the aircraft skin stretch forming device proposed by the present invention adopts the method of separating the stretching equipment 5 from the forming mechanism to form a brand-new aircraft skin stretch forming device, specifically say, such as figure 1 , figure 2 , image 3 , Figure 4 shown.

[0035] like image 3 As shown, n pairs of exciters 3 are arranged symmetrically inside both sides of the mold 2; the mold 2 is connected to the workbench 6 through a fixture 7; an elastic pad 4 is arranged between the mold 2 and the workbench 6, thereby forming Forming mechanism: the forming mechanism prevents vibration from being transmitted to the worktable 6 by setting the elastic pad 4, thereby re...

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Abstract

The invention discloses a vibration-assisted aircraft skin stretch forming and resilience inhibition device and technique. The device is characterized in that the following components are included: a mould, a vibration exciter, a cushion, a stretching device, a workbench, a fixed part; the vibration exciters are symmetrically fixed inside both sides of the mould, and the mould is provided with a cushion underneath. During stretch forming, stretching motion and vibration of the vibration exciter function synchronously; the control system starts the vibration exciter, and drives the mould to vibrate at a low frequency, till the forming process is finished. After stretch forming is finished, the vibration exciter drives the mould and the formed aircraft skin to vibrate at a high frequency to prevent the resilience of the aircraft skin. The aircraft skin stretch forming and resilience inhibition device and technique can ensure the sufficient deformation of sheet bars, and prevent resilience of the aircraft skin, thereby improving the forming quality.

Description

technical field [0001] The application belongs to the technical field of punching and forming, and specifically relates to a device and a process method for improving the quality of aircraft skin stretch forming parts and suppressing springback. Background technique [0002] Stretch forming is one of the main forming methods of aircraft skin parts. During the stretch forming process, uneven distribution of stress will be generated inside the sheet, and a large friction force will be generated between the mold and the sheet, so that after forming The thickness of the skin parts is uneven, the forming is insufficient, and the surface defects are obvious, which greatly reduces the forming quality of the skin parts. At the same time, after the stretch forming is completed, the aircraft skin parts are separated from the mold. Due to the residual stress inside the parts, the shape of the formed parts rebounds, which affects the use and even causes scrapping. [0003] In response ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/22B21D37/12
CPCB21D22/22B21D37/12
Inventor 赵坤民柏玲磊陈梁玉陈彦甄善鹤吴帆胡小品严建文
Owner HEFEI UNIV OF TECH