A design method for the shape of rubber winding forming pressure roller

Abstract

The invention discloses a method for designing the shape of a rubber winding forming press roller, which belongs to the technical field of rubber winding forming. First, calculate the winding angle based on the width of the rubber tape and the radius of the mandrel. Secondly, wrap the tape along the direction that the angle between the mandrel axis and the axis of the mandrel is the winding angle. This direction is the winding helix direction A-A, and the vertical section of A-A is the B-B plane, and the mandrel is determined at the section B-A The elliptic equation on B. Finally, with the ellipse equation as the generatrix and the axis of the winding roller as the center line of rotation, the elliptical surface of rotation of the winding roller is constructed to complete the shape design of the rubber winding roller. The rubber winding pressure roller designed by this method is suitable for the hoop winding requirements of the solid rocket motor barrel section and the transition part at both ends of the heat insulation layer. The shape of the rubber winding pressure roller is designed by adopting the smallest diameter model among the solid rocket motor models, which can meet the automatic winding requirements of the rubber insulation layer of the barrel section of other different types of solid rocket motors.

Description

technical field [0001] The invention belongs to the technical field of rubber winding molding, and relates to a method for designing the shape of a pressure roller of a solid rocket motor heat insulation layer winding molding. Background technique [0002] At present, solid rocket motor casings are generally manufactured by forming an inner layer of EPDM rubber insulation and a composite material winding casing. The molding methods of EPDM rubber insulation layer mainly include artificial patch method and winding molding method. During the winding forming process of the thermal insulation layer of solid rocket motor, the self-adhesive performance is improved by heating the EPDM tape, and the tape is wound on the mandrel by winding rollers. The winding pressure directly affects the shape of the thermal insulation layer and the bonding of the thermal insulation layer. Strength and density. Since the surface of the winding mandrel and the rubber insulation layer are curved su...

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Problems solved by technology

[0004] In the automatic winding process of the thermal insulation layer of the barrel section of the solid rocket motor, if the shape of the winding pressure roller adopts a simple cylindrical shape, when winding in the hoop direction, the shape between the shape of the pressure roller and the shape of the mandrel (or the shape of the heat insulation layer) is wound along the width direction of the tape. The distance is inconsistent, the distance at the edge of the tape is large, and the winding pressure is small, which affects the winding quality and bonding quality, and even causes warping on both sides of the winding tape. Therefore, it is necessary to reasonably design the shape of the winding pressure roller

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