An automatic forming machine for thin-walled short u-bend pipe with welding ring

Abstract

The invention discloses an automatic forming machine of a thin-walled short U bent pipe with a welding ring, relates to the technical field of automation equipment, and can continuously accomplish the forming of the thin-walled short U bent pipe and socket welding ring operation, so as to prevent a pipe wall from folds. The automatic forming machine comprises a feeding assembly, a pipe cutting assembly, a pipe bending assembly, a circumference position rotating assembly and a socket welding ring assembly, wherein the feeding assembly at least comprises a clamping mechanism and a No.1 driving mechanism; the No.1 driving mechanism drives the clamping mechanism to perform forward feeding; the pipe cutting assembly at least comprises a cutting tool mechanism and a No.2 driving mechanism; the No.2 driving mechanism drives a cutting tool to act; the pipe bending assembly at least comprises a fixed part, a semicircle die, a movable part and a No.3 driving mechanism; one end of a fixed length pipe is clamped at the fixed part; the other end of the fixed length pipe gets over the semicircle die and then is movably matched with the movable part; the circumference position rotating assembly at least comprises a rotating frame, a pipe clamping mechanism, a No.4 driving mechanism and a discharging cylinder; the socket welding ring assembly at least comprises a welding ring feeding unit, a welding ring guide unit and a socket welding ring unit; the socket welding ring unit pushes the welding ring to a straight pipe section of the thin-walled short U bent pipe.

Description

technical field [0001] The invention relates to the technical field of automation equipment, in particular to an automatic forming machine for thin-walled short U-bend pipes with welding rings. Background technique [0002] With the continuous advancement of science and technology and the rapid development of industrial production, the demand for bent pipes in industry is gradually increasing. The quality of bent pipes will directly affect the structural rationality, safety and reliability of products in these industries. sex. The thin-walled short U-bend tube with welding ring is the main component of the heat exchanger, and it is widely used in heat exchangers, air conditioners, refrigerators and other equipment. [0003] Thin-walled short U-bends with welding rings on the market basically adopt manual or semi-automatic operation methods, whether it is the elbow forming process or the sleeve welding ring process. In actual production, there are labor-intensive, low-effici...

AI Technical Summary

Problems solved by technology

[0005] ①Using pipe bending first + pipe cutting later: a continuous production line is formed by combining the pipe bending machine, pipe cutting machine and pipe material transmission line. In the process of pipe bending and then pipe cutting, it is necessary to cut and saw the short U bend pipe, and the pipe material A large amount of metal shavings are likely to be produced during the sawing process, so the subsequent process needs to increase the cleaning and deletion process. At the same time, the pipe material needs to be cut off the folded and deformed part of the end of the bent pipe during the sawing process. According to statistics, the cut waste accounts for 20% of the raw materials. %, so this scheme will also cause a large waste of pipe material;

[0006] ②Adopt pipe cutting first + pipe bending later: Zhangjiagang Jiangsu University of Science and Technology Industrial Technology Research Institute and Jiangsu University of Science and Technology jointly disclosed a bending forming production line (Chinese Patent Publication No.: CN104826925A), which includes an unwinding mechanism and a feeding straightening device , cutting mechanism, bending forming equipment and feeding mechanism, wherein the bending forming equipment clamps the pipe material through the central clamping device, and the left and right double heads are individually bent. Although the left and right bending forming devices are equipped with clamping devices, the pipe can be It plays a positioning role in the process of material bending, but for the forming of thin-walled short U-bends, except for the middle part of the straight pipe section at both ends, it needs to be bent and deformed, which also means that the clamping and positioning area is limited during the bending process, which is not easy Multi-point clamping, if this scheme is used to process thin-walled short U-bend pipes, the U-shaped arc surface of the pipe material will be wrinkled, and the inner diameter of the pipe material clamping point will shrink, which will affect the flow rate and service life of the pipe material.

[0007] In order to solve the problem of the welding ring process after the elbow is formed, first of all, some manufacturers use an additional conveying + feeding device or an industrial robot to carry out the integral feeding. Although this solution can solve the problem of low automation, However, whether it is the traditional transmission + feeding device or the emerging industrial robot application, it will bring pressure to the user with high equipment costs; for the subsequent procedures such as shaping and welding rings, domestic Wuhu Meiwei Packaging Products Co., Ltd. has disclosed A kind of small pipe bending collar machine (Chinese Patent Publication No.: CN104759891A), including the design of the upper mold and the lower mold for the fixing fixture, and a jacking device for jacking up the upper mold of the mold is arranged below the fixing fixture. During the blanking and parting process, the upper mold needs to be raised to the height of the outer diameter of the short U elbow, and the spring connection between the upper and lower molds will fail as the number of uses increases. At the same time, due to the In the absence of a pushing mechanism from the inside to the outside, the material can only be unloaded by applying pressure again from the outside to the inside through the additional mechanism outside the rotating disk to act on the straight pipe section of the short U elbow. However, due to the compact space of the existing heat exchange equipment, the More and more important, most equipment uses thin-walled short U-bend pipe socket welding ring, and the fatigue strength of thin-walled short U-bend pipes under frequent stress will also decrease

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