Stent bending manufacturers detailed aluminum profile bending simulation modeling

The bending forming process is complex, and there are many factors that affect the stretch formability, including the cross-section and structural morphology of aluminum profiles, material performance parameters, bending process morphology and equipment forming parameters. In the past, experience and trial production methods were mainly used to determine the reasonable stretch forming scheme of aluminum profiles, but the cost was high and the cycle was long. With the development of finite element CAE analysis technology, it is possible to quickly predict defects in the bending process, analyze the influence of each molding parameter on the molding results, so as to develop a reasonable molding scheme, help designers shorten the development cycle, reduce development costs, the following pull bending manufacturers detailed aluminum profile pull bending simulation modeling.

The PamStamp software is used to study the numerical simulation modeling technology of the section steel, which accurately simulates the bending motion process of the section steel, avoids the complex process of calculating the motion trajectory of the end of the clamp, and provides an effective and reliable solution for the bending CAE analysis. However, the bending manufacturers believe that the bending modeling process is still very troublesome and takes a long time. Therefore, the manufacturer believes that how to carry out rapid modeling, reduce the errors in the modeling process, and formulate a standard process is a necessary problem for bending forming.

Bending forming mainly includes three stages: pre-stretching, bending and Bonin field. Pre-stretching is to stretch the steel before bending, and its function is to make the material undergo plastic deformation and reduce the amount of springback in the later period. Bending is the process of pulling out the profile from the clamps on both sides and moving around the stamping. Its function is to cause plastic deformation of the steel and reduce the rebound value of the steel.

Stretch bending manufacturers talk about the difference between bending and other bending forming:

Stretch bending manufacturers believe that bending profile is a kind of bending profile, which belongs to the metal plastic forming paradigm, but there are still differences between bending forming and bending, roll forming and other forming methods.

(1) The axial stretching of the profile during the bending process, the inside of the bending is still in a tensile deformation state, which is different from the roll or bending, and there is no wrinkle inside.

(2) When bending, the upper and lower layers of the section steel are pulled up, the outer layer increases when bending, the inner layer is compressed, and the springback of the bent parts becomes smaller.

(3) Compared with other bending processes, bending is the forming of parts with changing curvature, and does not need to conform to multiple bending radii. By directly forming the desired curvature, the part accuracy can be better controlled.

(4) The inside of the bend will also increase, so the friction force generated by contact with the mold parts is different from other bending forming methods, and the influence on the distortion of the section is also different. Other bending methods depend on the middle position, and the larger section twist position is on both sides.

Analysis of profile bending modeling by the bending manufacturer:

The stretch bending manufacturer said that it has established a finite element model of profile stretch bending, stamping forming and profile contact, clamping and profile steel connection, pulling through the slider, linear motion through the slider in the tube, rotating the tube around the fixed axis, and the finite element model of stretch bending motion simulation. The finite element model of dynamic simulation does not need to recalculate the fixture motion trajectory according to different stamping curvature. If the formed profile requires springback compensation or curvature change, only adjusting the motion parameters can improve the modeling efficiency.

The slider must move linearly on the tube, so the tube is a rigid body in the model, and the slider must be defined as a property of the Surafceblank like a profile. In order to prevent obvious deformation of the slider by force, the elastic coefficient of the slider must be set larger, and the friction coefficient of the slider and the tube is set to 0.01 to ensure that the slider slides smoothly on the tube.

The front impact beam steel has different wall thicknesses, the wall thickness of the upper and lower two faces is 3.0mm, and the wall thickness of the middle three vertical faces is 2.5mm. In the finite element analysis, the average analysis of the sidewalls of different thicknesses into one thickness will affect the analysis accuracy, just as the size of the material thickness section distortion is different when calculating the section distortion.