An expansion bellows end shaping device and method
A shaping device and bellows technology, which is applied in the field of expansion bellows end shaping devices, can solve problems such as the inability to shape and correct the end face of the bellows, and achieve the effects of poor shape stability of the end face, stable and reliable operation, and simple structure
Active Publication Date: 2016-09-21
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
The main disadvantage of this device is that it can only achieve shaping of the long-diameter large arc and short-diameter small arc, but it cannot perform shaping and correction on the entire end face of the bellows
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[0024] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0025] figure 1 The end face shaper 21 of the expansion bellows end shaper according to the present invention is shown. As shown in the figure, the end face shaper 21 includes an outer shaper, an inner shaper and a heating device (not shown). The outer shaping mechanism includes a first outer shaping member 2 and a second outer shaping member 5 . The first outer shaping part 2 and the second outer shaping part 5 are connected to each other through the mating surface, thereby forming a shaping cavity 17 consistent with the standard outer surface of the expansion bellows to be shaped, which is figure 2 shown more clearly in .
[0026] In this specific embodiment, the shaping cavity 17 is in the shape of "8". Form...
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The invention relates to an expansion corrugation pipe end shaping device. The expansion corrugation pipe end shaping device comprises an end face shaper, a positioning device and a heating device, wherein the end face shaper comprises an external shaping mechanism composed of a first external shaping piece and a second external shaping piece, an internal shaping mechanism composed of a first internal shaping piece and a second internal shaping piece and a hydraulic mechanism. The shaping process of the end face of an expansion corrugation pipe is completed through effects of the hydraulic mechanism on the external shaping mechanism and the internal shaping mechanism. The heating device can effectively improve residual stress distribution status in the end of the expansion corrugation pipe, and reduces rebound after second shaping. The expansion corrugation pipe end shaping device is simple in structure, stable and reliable in work and low in input cost, solves the problem that the end face of the expansion corrugation pipe is poor in shape stability, and provides guarantees for safe welding connections.
Description
technical field [0001] The invention relates to a device and method for shaping the end of an expansion bellows, in particular to a correction device for the end of an expansion bellows with an "8" cross section. Background technique [0002] In oilfield wellhead engineering, the expansion bellows are connected by welding. Since the cross-sectional shape of the expansion bellows is a special "8" shape, it is difficult to keep accurate and consistent during the manufacturing process. Therefore, there is a certain deviation in the outer dimensions of the manufactured expansion bellows. In the welding process, if the expansion bellows is not corrected, the groove group will have a great influence on the error, and it is difficult to meet the technical requirements of automatic welding, which increases the difficulty of welding. [0003] There is an existing device for shaping and correcting corrugated pipes with special-shaped cross-sections. The device uses a hydraulic mechani...
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IPC IPC(8): B21D3/14
Inventor 刘晓丹陶兴华牛新明涂玉林陈天成胡彦峰韩玉玺张海平任建新韩振强
Owner CHINA PETROLEUM & CHEM CORP