Folding boom and fiber-enhanced resin-based composite material arm joint and making method thereof

Abstract

The invention discloses a folding arm boom and a fiber-enhanced resin-based composite material arm joint and a making method thereof. The making method comprises the following steps: 1, an inner mold core (1) is wrapped with an internal layer pressurization bag (2), and a gas in the internal layer pressurization bag (2) is pumped out, so that the internal layer pressurization bag (2) is attached on the surface of the inner mold core (1), and the inner mold core (1) shrinks and deforms under the action of external gas pressure of the internal layer pressurization bag (2); 2, a fiber material (3) is laid on the outer side surface of the internal layer pressurization bag (2); 3, a gas is introduced into the internal layer pressurization bag (2), so that the inner mold core (1) rebounds and expands, and the fiber material (3) stretches to have tension under the effects of expansion force; and 4, the fiber material (3) curs on the outer side surface of the internal layer pressurization bag (2) to form the fiber-enhanced resin-based composite material arm joint comprising the inner mold core (1).

Description

technical field [0001] The present invention relates to a method for manufacturing a boom section, in particular, to a method for manufacturing a fiber-reinforced resin-based composite material boom section. On this basis, the present invention also relates to a fiber-reinforced resin-based composite material boom segment produced by the manufacturing method and a folding boom including the boom segment. Background technique [0002] Typically, a folding boom can be applied to a concrete pump truck, and the concrete delivery pipe can be supported on the folding boom and then folded, so that the concrete can be delivered to a designated position in the unfolded state, and placed on the support in the folded state. on a foundation such as a turntable. The traditional folding boom usually consists of 3-6 steel boom sections with greater rigidity. [0003] The steel boom section is welded by four steel plates. In order to meet the requirements of safety and long boom, the cont...

AI Technical Summary

Problems solved by technology

[0004] However, the existing carbon fiber composite boom section is usually designed with a hollow inner cavity, which makes the folding boom poor in impact resistance and low in stiffness

In addition, the forming molds developed for different models need to be taken out by demoulding technology after the boom section is formed, which increases the production cost

Therefore, at present, carbon fiber composite jibs are only used on some ultra-long jibs

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