High-efficiency grinding-free automatic pipe making machine and pipe making method

Abstract

The invention discloses a high-efficiency grinding-free automatic pipe making machine and a pipe making method. The pipe making machine includes a steel strip unwinding device, a steel strip flattening device, a steel strip hemming device, a steel strip closing device, and a closing welding device arranged in sequence. 1. Steel pipe shaping device and shaping and sizing device. The steel strip folding device presses the two side edges of the flattened steel strip into right-angled secondary bending edges. The steel strip closing device presses the steel strip to make the steel strip The two sides are gradually bent upwards and then closed, and the two sides of the steel belt of the closing welding device are welded to form a steel pipe. The pipe-making process adopted in the present invention gradually presses the two edges of the steel strip into a groove shape, and then closes the steel strip. After closing, the edges on both sides are located inside the groove body. When in use, the weld seam will be covered in the groove without affecting Use appearance. Therefore, the welding seam does not need to be polished, which can greatly improve the production efficiency and the problems caused by the welding seam grinding. There are no weld seams or grinding marks on the surface of the pipe, and the surface state can be easily smoothed to improve product quality.

Description

technical field [0001] The invention relates to the field of special-shaped pipe production and processing, in particular to a high-efficiency grinding-free automatic pipe making machine and a pipe making method. Background technique [0002] When making traditional stainless steel grooved pipes, it is generally used to make grooves in the center of the steel strip first, then curl the steel strips, and make grooved steel pipes after welding. The weld seam of this kind of pipe is on the outer surface of the pipe body , the weld seam is uneven and the color is different from the original steel, so the weld seam must be ground off and then polished. However, the pipe welding process is accompanied by many uncertain factors. The weld seam is uneven, and some places cannot be polished during grinding. Therefore, there are obvious unevenness and obvious grinding marks in some parts, which greatly affect the quality of the product. Therefore, it is necessary to carry out two sand...

AI Technical Summary

Problems solved by technology

However, the pipe welding process is accompanied by many uncertain factors. The weld seam is uneven, and some places cannot be polished during grinding. Therefore, there are obvious unevenness and obvious grinding marks in some parts, which greatly affect the quality of the product. Therefore, it is necessary to carry out two sanding

However, the secondary grinding can only remove the redundant and scratched parts on the surface, and cannot repair the uneven surface of the pipe. Therefore, the quality of the grooved pipe produced by the traditional pipe making machine is not high, and the production efficiency is low.

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