Molding die of long-strip composite material workpiece and die opening and closing method

Abstract

The invention relates to the field of composite material molding, in particular to a molding die of a long-strip composite material workpiece and a die opening and closing method. A die opening and closing mechanism adopts the clamshell opposite closing form, the string plane is used as the die separating surface, and the sequence is opposite during die closing. The molding die comprises overturning frames, an upper die supporting frame and a lower die supporting frame arranged transversely and sequentially, an upper die is placed on the upper die supporting frame, and a lower die is fixed onthe lower die supporting frame; and n pairs of front and rear lugs are arranged on the two side faces of the upper die in the transverse direction, the n overturning frames can move in the connectiondirection of the front lugs and the rear lugs and are provided with cantilevers capable of moving up and down, and front electrically controlled pin shafts and rear electrically controlled pin shaftscapable of being combined with the front and rear lugs respectively are arranged below the cantilevers. The effective implementation of die opening, overturning and die closing action of the long-strip workpiece in the pressing molding process can be achieved, and the smooth molding operation of the product in the die is ensured.

Description

technical field [0001] The invention relates to the field of composite material forming, in particular to a forming mold for a long composite material workpiece and a method for opening and closing the mold. Background technique [0002] During the compression molding process of heavy-duty helicopter composite blades, the mold opening and closing mechanism adopts the clamshell-type joint form, with the chord plane as the mold parting surface, and the end face shafts at both ends of the upper mold as the supporting shafts. Through the turning cylinder, the upper mold Turn over 180° and make the upper model face up, which is convenient for composite material laying, and the order is reversed when closing the mold. [0003] However, for the compression molding of heavy-duty helicopter composite blades, if this method is still used, only relying on the two ends of the upper mold as the fulcrum, making the mold with a length of 16 meters and a weight of 20 tons perform the above ...

AI Technical Summary

Problems solved by technology

[0003] However, for the compression molding of heavy-duty helicopter composite blades, if this method is still used, only relying on the two ends of the upper mold as the fulcrum, making the mold with a length of 16 meters and a weight of 20 tons perform the above actions, which will cause the center of the mold to be affected by gravity. Large stress deformation occurs, which in turn affects the synchronization and accuracy of upper mold clamping

Leading to the suspension of the production of composite material blades, it will seriously affect the production and delivery tasks of helicopter products

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