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Method for controlling roll bending forming arc deformation of aluminum profile with cavity

A technology of deformation control and aluminum profiles, which is applied in the field of aluminum alloy processing, can solve the problems of low profile forming accuracy of bending parts and large deformation of the bending section, to protect the surface finish of the inner cavity, continuous and natural bending arc, and convenient and fast operation Effect

Pending Publication Date: 2021-10-01
ALNAN ALUMINIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for controlling the bending arc deformation of aluminum profiles with a cavity, which is applied to rail transit profiles with small bending radii and short arc lengths, and is suitable for short arc lengths < 500 mm and bending radius R ( 100<R<1000mm) for profile bending; it can effectively solve the problems of low profile forming accuracy of bent parts and large section deformation of the bending section during the rolling bending process of large-section profiles. The inner and outer surfaces of the bending section are smooth and straight The transition between segments and curved segments is natural and smooth

Method used

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  • Method for controlling roll bending forming arc deformation of aluminum profile with cavity
  • Method for controlling roll bending forming arc deformation of aluminum profile with cavity
  • Method for controlling roll bending forming arc deformation of aluminum profile with cavity

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Taking the 6005A-T5 rail transit door column aluminum profile as an example, the matching gap with the profiling inspection tool is required to be less than 1mm, the arc transition is smooth, there are no visible wrinkles, and the cross-sectional deformation is less than 0.5mm.

[0037] (1) Determine the thickness of the profiling sheet, where the bending radius R of the profile is 400mm, the wall thickness t of the profile is 3mm, and the empirical correction value C is 1;

[0038] Calculate d= R / 50+2t+C=400 / 50+6+1=15mm.

[0039] (2) Determine the inclination angle of the end face of the profiling steel bar, where the center angle α corresponding to the bending arc length is 65°, which is the cavity height in the radial direction of the bending arc + the profile wall thickness A is 138mm, and B is the bending The radial cavity height of curved arc is 132mm, and the empirical value t is 7°;

[0040] β=arctan [(παA) / (760°B)]+t= arctan [(3.14*65°*138) / (360°*132)]+7°=arct...

Embodiment 2

[0046] Taking the 6082-T6 square tube aluminum profile as an example, the matching gap with the profiling inspection tool is required to be less than 2mm, the transition at the arc is smooth, there are no visible wrinkles, and the cross-sectional deformation is less than 1mm.

[0047] (1) Determine the thickness of the profiling sheet, where the bending radius R of the profile is 600mm, the wall thickness t of the profile is 5mm, and the empirical correction value C is 1;

[0048] Calculate d= R / 50+2t+C=600 / 50+10+1=23mm.

[0049](2) Determine the inclination angle of the end face of the profiling steel bar, where the center angle α corresponding to the bending arc length is 30°, which is the cavity height in the radial direction of the bending arc + the profile wall thickness A is 80mm, and B is the bending The radial cavity height of curved arc is 70mm, and the empirical value t is 10°;

[0050] β=arctan [(παA) / (760°B)]+t= arctan [(3.14*30°*80) / (360°*70)]+10°=arctan0.2990+10...

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Abstract

The invention relates to a method for controlling roll bending deformation in roll bending forming of an aluminum profile with a cavity. The method comprises the following steps: 1, according to the shape of an inner cavity of a profile to be roll-bent, the length of the profile to be bent and the bending radian, profiling steel bars of linear sections and a plurality of profiling sheets are manufactured; 2, before roll bending, the profile is loaded into a roll bending machine, the roll bending starting position is determined, and the profiling steel bar at one end, the profiling sheets and the profiling steel bar at the other end are sequentially loaded into the inner cavity of the profile; 3, the filled profile enters the roll bending machine to be subjected to roll bending; and 4, the profiling steel bars and the profiling sheets at the two ends of the profile subjected to roll bending are sequentially taken out, the profiling steel bars and the profiling sheets are loaded into the inner cavity of another profile to be subjected to roll bending, and roll bending work is repeated. According to the method, the problems that in the roll bending process of the large-section profile, the contour forming precision of a bent part is low, and the section deformation of a bent section is large can be effectively solved, the inner side face and the outer side face of the bent section are smooth, and transition between a linear section and the bent section is natural and smooth.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to a method for controlling bending arc deformation of an aluminum profile with a cavity. Background technique [0002] Due to its superior mechanical properties, superior formability, light weight and excellent corrosion resistance, aluminum profiles can be used in all aspects of industry, and are widely used in the transportation industry, including automobile manufacturing, rail transit industry, equipment and Machinery and equipment manufacturing, consumer durables, etc. [0003] In the field of automobile manufacturing and rail transit manufacturing, the originally straight aluminum profiles need to be bent into various radians or angles to meet the streamlined curve or beautiful appearance of the vehicle. In the process of bending aluminum profiles, there are various forming methods such as pressing, bending and rolling. Due to the long length and large cro...

Claims

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Application Information

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IPC IPC(8): B21D9/10B21D9/01B21D53/88
CPCB21D9/10B21D9/01B21D53/88
Inventor 胡武黄宗福郑义卢有庆左庆华甘斌孟宪壮戴小杰邓合辉蔡莲苏念盛吴艳梅黄润生梁树富
Owner ALNAN ALUMINIUM CO LTD
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