PROCESS OF BENDING METAL PIPES AND PROFILES

Description

1 / 4 PROCESS OF BENDING METAL PIPES AND PROFILES BRIEF DESCRIPTION

[001] This patent application describes a metal bending process, which is clean and environmentally friendly, and allows for the bending of profiles of various dimensions and material types, as well as a wide range of dimensional combinations of the desired final curvature, resulting in curved parts with an excellent surface finish. FIELD OF APPLICATION

[002] The field of application of the present invention is related to mechanical engineering, more specifically in the area of ​​bending tubes and profiles, allowing the creation of complex shapes without seams, reducing welding points and increasing structural resistance. This is fundamental for sectors where pressure, aesthetics or assembly efficiency are essential. Improving the process of bending metal tubes and profiles with special radii, according to the needs of each client, and not limited to the standard radii practiced in the market, and / or reduced quantities that make the construction of a dedicated bending tool unfeasible. STATE OF THE ART

[003] Currently known are the void bending processes, in which the process takes place without internal filling of the profile, the bending process with a dedicated die with a tenon, and the induction process, which takes place in a special machine and with extremely expensive localized heating.

[004] Document BR 112017007165-7 refers to a process for bending pressure-resistant pipes by induction, containing a thick wall and a large diameter. Petition 870260030855, dated 01 / 04 / 2026, page 5 / 10 2 / 4

[005] Document DE2513561 refers to a pipe bending device for bending or clamping pipes of a wide diameter range using known heating devices.

[006] Document PI9105493 refers to a process for bending hollow metal profiles according to the roller bending process, in which the hollow profile to be bent is filled in its internal space and is introduced into a bending station consisting of several bending rollers, wherein the bending of the hollow profile occurs through movement of the bending rollers in the bending plane and a device for carrying out the process. OBJECTIVE OF THE INVENTION

[007] The objective of the present invention is to improve the bending process of metal tubes and profiles, without wrinkle formation, low cost and excellent surface finish. ADVANTAGES OF THE INVENTION

[008] One of the main advantages of this process is that it does not harm the environment, since it uses water and sand, which can be reused infinitely. It also preserves the metal profile used, as it does not contaminate it with chemical additives, and it is a process that requires less electricity consumption compared to, for example, the induction process.

[009] Another advantage is that the process of the present application is economically viable, given the bends that require the manufacture of a specific internal tenon. DETAILED DESCRIPTION OF THE FIGURES

[010] Figure 1 is a photograph detailing step 1 of the process, in which after cutting the tube (1), the check valve (2) is inserted at one end. Petition 870260030855, dated 01 / 04 / 2026, page 6 / 10 3 / 4

[011] Figure 2 is a photograph detailing step 2 of the process, in which the tube (1) is filled with the appropriate mixture and the second check valve (3) is introduced.

[012] Figure 3 is a photograph detailing step 3 of the process, which shows the introduction of the tube (1) for freezing at a controlled temperature.

[013] Figure 4 is a photograph detailing step 4 of the process, in which the tube (1) is bent in a bending machine.

[014] Figure 5 is a photograph detailing step 5 of the process, in which the internal material is removed after bending.

[015] Figure 6 is a photograph of the finished tube (1), which is clean and approved after dimensional control. DETAILED DESCRIPTION OF THE INVENTION

[016] The process according to the invention is carried out in the following steps:

[017] First, an expansion valve is placed at one end, placing the tube in a vertical position, filling begins in a proportion of 80% (v / v) sand and 20% (v / v) water, step by step, vibrating vertically to settle the materials, while simultaneously purging "removing unwanted gases", at the end of the filling, the other expansion valve is placed, (a valve with the purpose of absorbing the expansion of the materials when frozen, with each type of material and thickness having the desired pressure requirement met, thus achieving the best condition, reaching -30°C so as not to collapse the profile).

[018] The machines used in this process are: Presses or bending machines with dedicated molds, presses with alternating forming tools and high-power calenders for performing varying radii.

[019] It is true that when the present patent application is put into practice, modifications with regard to Petition 870260030855, dated 01 / 04 / 2026, p. 7 / 10 4 / 4 certain details, without this implying a departure from the fundamental principles that are clearly substantiated in the claim framework, it being understood that the terminology used was for descriptive purposes and not for limitation. Petition 870260030855, dated 01 / 04 / 2026, p. 8 / 10

Claims

1 / 1 CLAIMS 1. PROCESS OF BENDING PIPES AND METAL PROFILES, in which a metal profile is used for bending in a bending machine, where the lower end is plugged, characterized by placing an expansion valve at one end, placing the pipe in a vertical position, filling is started in the proportion of 80% (v / v) sand and 20% (v / v) water, step by step performing the vertical vibration process, at the same time purging, at the end of the filling the other expansion valve is placed, thus reaching the best condition at -30 °C. Petition 870250072367, dated 08 / 15 / 2025, page 9 / 17

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