Vehicle frame tube and manufacturing method thereof

Abstract

The invention provides a manufacturing method for a vehicle frame tube. The method comprises the following steps of: firstly, preparing a tubular base material, wherein the tubular base material is provided with an outer tube, an inner tube positioned in the outer tube, a plurality of ribs connected between the outer tube and the inner tube; secondly, cutting part of the ribs at the two ends of the tubular base material so as to form a forming space between the cut positions of each rib and the outer tube; and finally, extruding the two ends of the outer tube to ensure that the two ends of the outer tube pass through the forming space to be deformed and the outer tube is spherical to finish the manufacturing of the vehicle frame tube. By the method, the material cost can be saved; the spherical vehicle frame tube is manufactured; and the vehicle frame tube manufactured by the method can still provide enough structural strength and structural stability through the ribs of the vehicle frame tube under the condition that the whole weight is reduced.

Description

technical field [0001] The present invention relates to a frame tube, in particular to a manufacturing method of a frame tube and a frame tube manufactured by the manufacturing method. Background technique [0002] Generally, the frame of vehicles such as walkers, bicycles and scooters has a head tube, which is used for pivoting the rider's stand tube and the front fork upper tube, so that the front wheel can be adjusted by the deflection of the two relative to the head tube. Control the steering of the vehicle. [0003] The head tube is usually processed into a straight tube to facilitate the insertion of the driver's seat tube and the front fork upper tube. However, if a head tube with a special shape (such as a spherical surface) is to be manufactured by traditional cutting methods (such as CNC machining) At the same time, it is bound to consume quite a lot of materials, and at the same time, the tube walls on both sides of the spherical head tube after manufacture will ...

AI Technical Summary

Problems solved by technology

[0003] The head tube is usually processed into a straight tube to facilitate the insertion of the driver's seat tube and the front fork upper tube. However, if a head tube with a special shape (such as a spherical surface) is to be manufactured by traditional cutting methods (such as CNC machining) At the same time, it is bound to consume quite a lot of materials, and at the same time, the tube walls on both sides of the spherical head tube after manufacture will have a rather thick thickness.

Therefore, the spherical head tube manufactured by the traditional cutting method will bear more material costs and has a heavier weight

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