Forming device and method of composite material crease pipes
A composite material and molding method technology, applied in the field of composite material manufacturing, can solve the problems of high metal crease tube density, long processing cycle, low specific strength, etc., and achieve the effects of simple process, short production cycle, and easy operation.
Active Publication Date: 2019-05-24
DALIAN UNIV OF TECH
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Problems solved by technology
[0003] The invention provides a forming device and method for a fiber reinforced composite crease tube to solve many difficulties in the preparation of composite material crease tubes: such as mechanical connection, long processing cycle, high cost, poor integrity, and the density of metal crease tubes High, low specific strength and other issues
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[0038] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.
[0039] A method for forming a composite material crease tube mainly includes the following steps:
[0040] Step 1. Mold assembly: Assemble the inner mold components, mandrel and flange into an inner mold;
[0041] Step 2. Preheating: Preheat the internal mold to 105°C for 52 minutes, and then apply the release agent;
[0042] Step 3. Shaping: Heat the internal mold and composite material prepreg to 155°C to soften the material, and lay the composite material on the surface of the internal mold;
[0043] Step 4. Mold closing: Combine the inner mold obtained in step 3 with the outer mold. After the inner mold and the outer mold are respectively fastened to the outer fixing device, heat to 352°C, keep the temperature for 22 minutes, and apply a pressure of 2.2MPa while heating , followed by pressure-holding ...
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The invention belongs to the field of composite material manufacturing, and relates to a forming device and method of composite material crease pipes. The problems of forming difficulty, poor fiber specific strength and the like of the continuous fiber composite crease pipes are solved. The forming device is mainly composed of an internal mold, an external mold and an external fixing device. The internal mold is placed in the internal space of the external mold, and a gap between the internal mold and the external mold is adjusted according to the preparation of composite crease pipes of different thickness; and the internal mold and the external mold are placed in the internal space of the external fixing device and fixed together. The method comprises the steps of mold assembly, preheating mold, coating release agent, heating mold and composite material, laying composite material; fastening mold, heating and pressing, curing and forming, core pulling and removing mold, demoulding andcompleting molding. According to the forming device and method of the composite material crease pipes, the production cycle is short, the production cost is low, the designability is high, and the forming device and method of the composite material crease pipes can be applied to the processing and manufacture of complex composite material pipe energy absorption structure in an automobile, a trainand the other industrial equipment.
Description
technical field [0001] The invention belongs to the field of composite material manufacturing, and relates to a forming device and method for a composite material crease tube. Background technique [0002] At present, with the improvement of the transportation system, the driving speed of automobiles, trains and other means of transportation continues to increase, followed by more and more frequent collision accidents, which seriously damage the lives and property safety of the public. Installing energy-absorbing boxes at frequently-contacted parts is currently the main method to solve the collision problem. At present, the most widely used metal thin-walled pipe fittings mainly include traditional pipe fittings such as square pipes and round pipes, which are the easiest to process. In general, when the ordinary square tube is deformed, the energy absorption efficiency is relatively low. In view of this situation, some novel methods are applied to the structural design of ...
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IPC IPC(8): B29C33/00B29C33/48B29C70/34B29L23/00
Inventor 周才华王博李桐杨翔飞郝鹏毕祥军明世朝任明法姜开宇
Owner DALIAN UNIV OF TECH