Manufacture method for jointing and reinforcing pipe fitting made from composite materials

Abstract

The invention discloses a manufacture method for jointing and reinforcing pipe fittings made from composite materials, which comprises the following steps: firstly, a part of preformed pipe fittings are jointed and then yarn is supplemented at jointing positions; then, jointed frame bodies are placed in a chassis to be positioned; positions which need to be supplemented and reinforced by the yarn are provided with heating moulds to heat partial points of the frame bodies so that the composite materials at yarn supplementing positions are melted, solidified and connected to be shaped. The manufacture method does not need to heat the integral supporting and shaping chassis but only pointedly partially heats and shapes the jointing positions of the frame bodies, thereby reducing the energy consumption; the manufacture method omits a back-and-forth carrying and moving process and a cooling process because the manufacture method does not need to heat the integral supporting and shaping chassis and can be operated when the chassis is arranged on a machine table, thereby having convenient operation; and the heating mould for partial heating can be fast heated. The invention has short working time in manufacture procedure, and can effectively enhance the productivity.

Description

technical field [0001] The invention relates to a manufacturing method for forming pipe fittings using polymer composite materials, in particular to a manufacturing method for joining and reinforcing composite pipe fittings. Background technique [0002] In traditional bicycles, the entire vehicle frame is made of metal pipe fittings, but the bicycle with this welded metal structure has a heavy body and poor fatigue resistance. Therefore, in order to reduce the weight of the vehicle body and increase its fatigue resistance, the entire vehicle frame is made of light-weight, high-strength polymer composite carbon fiber material. [0003] At present, the common molding method of polymer composite frame is to preform each pipe part of the frame separately, and then splicing each pipe part, and then repairing and reinforcing the entire joint. The frame is heat-fixed. Since the joint reinforcement method adopts overall heating, the preformed pipe fittings need to be heated twice...

AI Technical Summary

Problems solved by technology

Since the joint reinforcement method adopts overall heating, the preformed pipe fittings need to be heated twice, and the shaped part will be deformed due to heating, so the integral mold must be used to fix the shape again, so the mold cost is high; in addition In order to ensure uniform heating, the fixed chassis also needs to be heated during the thermosetting process, which consumes a lot of energy; moreover, the fixed chassis will be deformed due to thermal expansion and contraction for a long time, resulting in deformation of the pre-fixed parts

Furthermore, for the secondary heating, the entire vehicle frame needs to be heated together with the mold into the heating room. Because the heat transfer of the air is slow, the required heating time is longer, which wastes man-hours virtually, resulting in low work efficiency.

In addition, in the process of processing, the tool needs to be transported back and forth according to the heating requirements, which wastes man-hours and manpower, and in the process of transport, it is easy to collide, easily cause defects in the product, and cause unsafe hazards

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