Forming process of rear triangular pipe fitting and claw hook of composite material frame

Abstract

The invention discloses a forming process of a rear triangular pipe fitting and a claw hook of a composite material frame. The forming process comprises the following steps of: firstly, performing various parts of a rear triangular pipe fitting and a claw hook of a frame with a carbon fiber composite material; splicing; filling yarn; and arranging in a die to finish a frame by integral forming. The new forming process of a rear triangular structure of a carbon fiber bicycle frame is adopted to ensure the integrity of the rear triangle of a composite material bicycle so as to enhance the strength of the rear triangle of the composite material bicycle, the tire position, the accuracy of the claw hook, the accuracy from the center of the rear claw hook to a five-way joint or a brake hole of a rear upper fork while enhancing the stability of the rear triangle, saving the cost of raw materials to the maximum extend and improving the utilization rate of raw materials. The invention has the advantages and the efficacy of enhancing the strength of the bicycle rear triangle, improving the size accuracy from the claw hook to the five-way joint or the brake hole of the rear upper fork and the centrality of the claw hook, decreasing the cost of raw materials, improving the utilization rate of the raw materials, having simple structure by the integral forming technology, reducing the steps needed by a manufacture process, shortening the time consumption, and the like.

Description

technical field [0001] The invention relates to a manufacturing process of a bicycle frame made of composite material, in particular to a forming process of a rear triangular pipe fitting and a claw of a composite material frame. Background technique [0002] The rear triangle structure of the bicycle frame is generally divided into two types. The first type is composed of a seat stay tube, a seat stay tube and a set of dropouts. The second consists of a single seatstay tube and a set of dropouts. The first method of making the rear triangle structure is generally to form the rear seat stay tube separately, and the rear seat stay tube is separately formed, and then after machining, use a jig to position the dropout and the tube with glue and yarn patching. And form the frame rear triangle. The second type of rear triangle structure mostly uses the rear fork to be formed separately, and then the drop claw and the rear fork are combined with a jig. After the bicycle rear tr...

AI Technical Summary

Problems solved by technology

If there is a dimensional deviation during the machining process, there will often be joint gaps and drop problems at the joint between the pipe fitting and the hook end, which will affect the quality of the frame product

Moreover, because the entire production process requires machining, bonding and other processing steps, the production cycle of the bicycle frame is slow, that is, the process time is long, and in the actual machining and bonding process, there will be problems at the joint caused by dimensional deviation. Problems such as clearance and poor smoothness

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