Pipe fitting forming device

Abstract

The invention provides a pipe fitting forming device used for forming a pipe fitting. The pipe fitting forming device comprises a base, two struts fixedly connected with the base, two movable shafts installed at the top ends of the two struts respectively, two sliding blanks connected with the two movable shafts, a combination mandrel arranged in a center hole of the pipe fitting, and a split upper pressing die located on the upper portion of the pipe fitting. By the adoption of the pipe fitting forming device, the split upper pressing die is convenient to dismantle, time and labor are saved, and control accuracy is high; in the process of bending the pipe fitting, the combination mandrel can be adapted to the inner wall of the pipe fitting automatically and intelligently according to the bending change condition of the pipe fitting; the movable shaft is arranged between the sliding blanks and the struts, so that resistance to the rotation of the sliding blanks is reduced; since the distance between the two struts can be adjusted, the defects in the relevant prior art are overcome, and the bending forming quality of the pipe fitting is guaranteed.

Description

technical field [0001] The present invention relates to a forming machine, more specifically, to a pipe fitting forming device used for forming bent pipes. Background technique [0002] At present, the third-generation advanced large-scale AP1000 pressurized water reactor nuclear power plant is an updated model of the world's second-generation and second-generation plus nuclear power plants. The main pipe has a large degree of bending and deformation, and there are two nozzles near the bending part, making it difficult to manufacture. At present, there is no mature manufacturing technology at home and abroad. The base, pillar, upper die, slide tire and mandrel are important components of the main pipe bending forming device, which have an important impact on the processing quality and success of processing. [0003] One, the base and the pillars are also connected with the slider except for the load-bearing function, and the spacing of the pillars directly affects the wheel...

AI Technical Summary

Problems solved by technology

[0016] (1) Although the supporting force of the mandrel is reduced by using this method to form pipe fittings, due to the large tonnage of the press, higher requirements are placed on the power equipment, which increases the requirements on the strength of the bending mold; the huge upper die and the cavity cause a huge waste of production materials;

[0017] (2) More than 95% of the inner mandrel is used to make the pipe fitting approximately solid, further increasing the pressure required for the bend; in addition, too much filling mandrel makes the cleaning and disassembly of the mandrel inside the pipe fitting abnormal after bending difficulty

[0018] The other is to use the traditional mandrel as the mandrel. The disadvantages are: bulky, difficult to manufacture, inconvenient to install and disassemble, and the quality of the pipe fittings after bending cannot meet the requirements. This kind of mandrel is mainly suitable for pipe fittings. Push bending or winding, seldom used for bending of pipe fittings

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