Carbon fiber composite material arm joint and preparation method thereof

Abstract

The invention provides a carbon fiber composite material arm joint and a preparation method thereof. The carbon fiber composite material arm joint comprises a carbon fiber composite material shell; an inner core filled in the carbon fiber composite material shell; a large-end end part connecting embedded part which is embedded in the large-end end part of the interior of the carbon fiber composite material shell and is embedded in the inner core; a small-end end part connecting embedded part which is embedded in the small-end end part of the interior of the carbon fiber composite shell and is embedded in the inner core; and a conveying pipe supporting embedded part which is embedded in the middle of the interior of the carbon fiber composite shell and is embedded in the inner core. According to the carbon fiber composite material arm joint, the end part connecting part adopts a hollow integral metal frame composite material coating and embedding form, so that the weight and the interface connecting strength are both considered; the inner core is provided with a three-dimensional latticed reinforcing piece in a penetrating manner, so that the internal traction of a cantilever crane shell is enhanced; and the shell is prepared by compounding different forming processes, so that relatively low mass and cost can be achieved, and relatively high structural efficacy can be achieved.

Description

technical field [0001] The invention belongs to the technical field of concrete pump trucks, and in particular relates to a carbon fiber composite arm section and a preparation method thereof. Background technique [0002] Concrete pump trucks play an irreplaceable role in many areas of modernization. With the development of the modern construction field, the boom height requirements of concrete pump trucks are getting higher and higher, so the development trend of longer and higher booms of concrete pump trucks has become inevitable. The boom frame of traditional concrete pump trucks is made of high-strength alloy steel, and the weight increases with the increase of the deployment height, which puts forward higher requirements for the loading and safety performance of concrete pump trucks, and has great impact on the construction scheduling of pump trucks and the work site. have great limitations. High-strength alloy steel has certain defects and hidden dangers in welding...

AI Technical Summary

Problems solved by technology

In this technology, the metal shafts bearing the force at the end are processed in series and the outer ring is reinforced with carbon cloth, and embedded in the foam material, because the corresponding shaft hole embedded in the foam material is only supported by the composite material shell on both sides. Positioning and connection constraints are unreasonable in the design of force transmission, and there are hidden dangers of fatigue damage at the position of the shaft hole for long-term use

[0004] Therefore, the existing composite material arm sections have insufficient strength at the connection part; the use of a single molding technology, the cost is high, or the general problem of surface quality control

In addition, the composite arm section also has poor rigidity, and the deformation after stress is larger than that of metal materials, and problems such as cracks and delamination will occur under concentrated stress

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