Folding arm frame, fiber reinforced resin matrix composite material arm section and manufacturing 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 invention relates to a method for manufacturing an arm section, in particular to a method for manufacturing an arm section made of fiber-reinforced resin-based composite material. On this basis, the present invention also relates to a fiber-reinforced resin-based composite jib section made by the manufacturing method and a folding jib including the jib section. Background technique [0002] Typically, the folding boom can be applied to a concrete pump truck. The concrete delivery pipe can be supported on the folding boom and then turned, so that the concrete can be delivered to the designated position in the unfolded state, and placed on the support in the folded state. On the basis (such as a turntable). Traditional folding jibs usually include 3-6 steel jib 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 arms, the thicker steel plates not only r...

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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