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Double-open type hollow profile frame stretch bending forming method

A stretch-bending, double-opening technology, applied in the field of plastic processing, can solve the problems of deformation control, increased feeding and filling, unpredictable part forming accuracy, etc., and achieves improved tensile rigidity, less manual trimming, and less springback. Effect

Active Publication Date: 2015-03-18
CAPITAL AEROSPACE MACHINERY +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

like figure 2 As shown, the main difference between the H profile and other hollow profile frames is that the H profile has a two-way open structure with a transverse rib in the middle. The two-way open structure adds great difficulty to the deformation control, feeding and filling during forming. Brings unpredictability to part forming accuracy

Method used

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  • Double-open type hollow profile frame stretch bending forming method
  • Double-open type hollow profile frame stretch bending forming method
  • Double-open type hollow profile frame stretch bending forming method

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Embodiment Construction

[0046] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] The invention mainly utilizes the stretch bending forming process to realize the manufacture of double open hollow profile frame parts.

[0048] The bending process is as image 3 shown. Stretch bending is to apply tangential tension while the wool 6 is bent, changing the stress state in the section of the wool 6, reducing or basically eliminating the bending springback, thereby improving the accuracy of the parts. The wool 6 is put into the jaw 7 and pre-stretched, the pre-stretched wool 6 is bent along the stretch bending die 8, and finally the pulling force is added to make it stick the film.

[0049] The stretch-bending forming method of the double-open hollow profile frame of the present invention comprises the following steps:

[0050] Step 1: Forming preparation

[0051] 1.1 Receive the straight profile material (2A12O) and ...

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Abstract

The invention belongs to the technical field of plastic processing, and particularly relates to a double-open type hollow profile frame stretch bending forming method. By successfully using a whole filler filling method for the first time, the deformation of a profile cross section is controlled, and the problem of filler falling is solved; the problems of profile twisting deforming and opening shrinkage caused by intermediate heat treatment are solved through an improved technological process. The stretching bending forming method has the main advantages that a frame is stretched and bent along a die, so that the distortion and twisting of the cross section are prevented, the tensile rigidity of components can be improved, the resilience is low, the residual stress is lower, the forming quality is higher, components with large relative bending radiuses can be controlled, the hand finish amount is small, and the production rate is high. A product processed and formed by using the method is formed and qualified for delivery, the assembly requirement is guaranteed, and a technology foundation is established for other subsequent products using profile stretching bending frames of the structure.

Description

technical field [0001] The invention belongs to the technical field of plastic processing, and in particular relates to a stretch-bending forming method for a double-open hollow profile frame. Background technique [0002] Such as figure 1 As shown, this structural part in previous products adopts the combination structure shown in the figure, which is composed of a T-shaped frame and two L-shaped frames. Such as figure 2 As shown, the main difference between the H profile and other hollow profile frames is that the H profile has a two-way open structure with a transverse rib in the middle. The two-way open structure adds great difficulty to the deformation control, feeding and filling during forming. Brings unpredictability to part forming accuracy. The use of two-way open hollow profile frames instead of combined structural frames has the following advantages: it not only ensures the smoothness of the inner surface structure, provides a larger inner space for the targe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21D7/025
CPCB21D7/085B23P15/00
Inventor 尹萍李旭东高林陆云鹏史红杰倪贵金刘祥龙张杰刚
Owner CAPITAL AEROSPACE MACHINERY
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