Tensile bending forming process of complex section bar

A forming process and profile technology, applied in the field of profile bending, can solve problems such as quality defects, achieve good forming quality, reduce springback and residual stress, and reduce cracking defects

Active Publication Date: 2011-10-12
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

[0005] In order to overcome the above-mentioned shortcomings, the object of the present invention is to provide a tension winding forming process capab

Method used

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  • Tensile bending forming process of complex section bar
  • Tensile bending forming process of complex section bar

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Example Embodiment

[0021] Such as Figure 1-2 As shown, the complex profile tension bending forming device of the present invention includes a stretching device 1, a profile 2, an adjusting mechanism 3, a movable mold 4, a ruler 5, a concave mold cavity 6, a chuck 7, etc. The specific structure is as follows:

[0022] The movable mold 4 is set corresponding to the concave mold cavity 6, so that the bending radius, bending angle and cross-sectional shape of the processed part are formed between the concave mold cavity 6 and the movable mold 4. One end of the movable mold 4 is provided with an adjustment mechanism 3, the movable mold The sliding body 8 in 4 is connected with the adjusting mechanism 3. The sliding body 8 is moved forward or backward through the adjusting mechanism 3. The other end of the movable mold 4 is connected with the concave mold cavity 6 by a shaft; one end of the profile 2 is installed in the chuck 7, The other end of the profile 2 is installed in the stretching device 1, and...

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Abstract

The invention provides a tensile bending forming process of a complex section bar, relating to the technical field of section bar bending forming and solving the problems of quality defects generated in a section bar bending process in the prior art. The tensile bending forming process of the complex section bar comprises the following steps of: manufacturing a concave mould cavity and a movable mould which corresponds to the concave mould cavity according to the bending radius, the bending angle and the sectional shape of a machined part; rotating a regulating mechanism to loosen the movablemould, and placing the section bar into the concave mould cavity; clamping one end of the section bar into a collet, and placing the other end of the section bar into a stretching device; applying a pulling force on the stretching device so that the section bar generates elongation, and rotating the regulating mechanism to enable the movable mould to tightly press on the section bar; applying a bending moment to the movable mould to enable the movable mould, the section bar and the stretching device to rotate along a scale so as to enable the section bar to be bent at a needed angle; and rotating the regulating mechanism, removing the movable mould, the stretching device and the collet, and taking out the bending formed section bar. According to the tensile bending forming process disclosed by the invention, the section bar with a complex sectional shape can be formed; the forming quality of a bending part is good, and a resilience amount is small.

Description

technical field [0001] The invention relates to the field of profile bending, in particular to a complex profile tension winding forming process. Background technique [0002] Bending processing of profiles occupies a very important position in industrial sectors such as metal structures, engineering machinery, vehicles and aerospace. In particular, the use of complex profile bending parts can reduce product costs and meet the demand for lightweight products. It has broad application prospects in the automotive and aerospace industries. At present, the bending processes of profiles mainly include stretch bending, winding bending and rolling bending. [0003] Stretch bending is a commonly used method of profile bending, but the outer side of the profile bent by this method has been excessively thinned or even cracked. When the profile is formed by bending, the springback of the profile is large, and the section distortion is serious. The profile formed by the roll bending ...

Claims

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Application Information

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IPC IPC(8): B21D7/025
Inventor 张士宏肖寒刘劲松王祺陈仕清
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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