Bicycle frame and manufacturing process thereof

Abstract

The invention provides a bicycle frame. The bicycle frame comprises hollow tubes and metal connecting pieces, wherein the metal connecting pieces comprise a five-way connecting piece, a claw connecting piece, a seat tube connecting piece and two bicycle head connecting pieces; a bicycle head is connected with an upper tube through one bicycle head connecting piece; the bicycle head is connected with a lower tube through one bicycle head connecting piece; the upper tube, a middle tube and an upper fork are connected together through the seat tube connecting piece; the lower tube, the middle tube and a lower fork are connected together through the five-way connecting piece; the upper fork and the lower fork are connected with each other through claws; the hollow tubes and the metal connecting pieces are glued into a frame body. A process for manufacturing the bicycle frame comprises the following steps: customizing the metal connecting pieces and the claws on a large scale, performing sand blasting and cleaning for later use; performing sand blasting on hollow tubes including the bicycle head, the upper tube, the middle tube, the lower tube, the upper fork and the lower fork, and cleaning for later use; gluing spare metal connecting pieces, claws and hollow tubes into a frame body; entering a baking procedure, and baking at the temperature of 140-160 DEG C for an hour for sizing; after baking, cooling to obtain the bicycle frame.

Description

technical field [0001] The invention belongs to the technical field of bicycle frames, and in particular relates to a bicycle frame and a manufacturing process thereof. Background technique [0002] Generally, the production process of carbon fiber frame is long and consumes a lot of labor, resulting in high labor cost, extremely poor mass production, and poor quality stability. In order to pursue lightweight, the thickness of the tube wall is made thinner and thinner, resulting in poor impact strength. , security incidents occur frequently. [0003] At present, the production technology of bicycle frame is as follows: [0004] 1. Joint type - that is, use carbon fiber or aluminum and magnesium composite materials to make car tubes, seat cushions, bottom brackets and other joints, and then make upper tubes, middle tubes, down tubes, upper and lower forks, etc., and glue them into a frame body . The joint in this way is heavy and the manufacturing cost is high. [0005] 2...

AI Technical Summary

Problems solved by technology

This method of joint weight is heavy, and the production cost is high

[0005] 2. Front and rear triangular combined type - that is, the front of the car, seat cushion, bottom bracket, upper, middle and lower tubes are made into one body, and then the upper and lower forks are made separately and then glued into a frame. The disadvantage of this method is that it is artificial High cost and poor mass production, resulting in high and low frame costs

[0006] 3. Pipe connection type - this method is to heat-press the head pipe, upper pipe, lower pipe, middle pipe, bottom bracket, lower fork, upper fork, etc. of the car, and then process the upper and lower pipes similarly to the metal frame welding method. The middle, lower tubes, and upper forks are combined with carbon fiber to cover the carbon fiber at the joints of each joint, and then hot-pressed to form a frame body. This process has high labor costs, poor mass production, and high frame costs.

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