Forming method of thick-wall winding square pipe

Abstract

The invention provides a forming method of a thick-wall winding square pipe, and belongs to the field of composite material wet winding. The problems that an existing composite material is wound around a thick-wall square pipe in a wet method, the round approaching phenomenon exists, and the glue content is large are solved. The method comprises the following steps: winding fibers on a mold according to a wet winding process to form an uncured winding product; after wet-process winding forming is finished, pressure equalizing plates are laid on the four planes of the outer side of the uncured winding product correspondingly, and the pressure equalizing plates and the surface of the winding product are attached and fixed; an isolating membrane is laid on the outer side of the pressure equalizing plate, collodion absorption cotton is arranged outside the isolating membrane, and a vacuum bag is arranged outside the collodion absorption cotton in a sleeving mode; the interior of the vacuum bag is vacuumized, the winding product is heated and cured, and the vacuumizing process and the curing process are conducted at the same time; and after the wound product is cured, the vacuum bag, the glue absorbing cotton, the isolating membrane and the pressure equalizing plate are sequentially removed, and the thick-wall wound square pipe is obtained after demolding. The forming device is mainly used for forming the thick-wall winding square pipe.

Description

Technical field [0001] The present invention belongs to the field of wet winding of composite materials, in particular to a thick-walled winding square tube forming method. Background [0002] For the wet winding of thick-walled square pipes, in order to achieve the cross-sectional shape tolerance and size, the metal closed outer mold method is mostly used to fix the shape. However, the process can not fundamentally solve the problem of large rubber content, and the use of metal outer mold hard fixation, so that the fiber straightness decreases, resulting in a lower fiber strength; and the external mold processing difficulty is higher, the cost is higher, the operation is more difficult. Moreover, in the field of composite wet winding, thick-walled square pipe winding still exists due to the large tension at the fillet and the tension at the plane is small, resulting in uneven thickness, large glue content and other issues, according to the thick-walled square pipe traditional wi...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention aims to propose a method for forming a thick-walled wound square tube to solve the problem of rounding phenomenon and large glue content in existing composite material wet-wound thick-walled square tubes

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