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CN-121989392-A - Spherical cover skin molding composite tool and application method thereof

CN121989392ACN 121989392 ACN121989392 ACN 121989392ACN-121989392-A

Abstract

The invention discloses a spherical cover skin molding composite tool and a use method thereof, wherein the spherical cover skin molding composite tool comprises a composite die body, a spherical cover skin and a spherical cover, wherein the composite die body is made of the same material as a spherical cover skin workpiece, the concave spherical surface of the composite die body is a molding functional surface for molding the spherical cover skin workpiece, and the convex spherical surface of the composite die body is provided with a plurality of reinforcing ribs; and the metal frame is connected with the convex spherical surface of the composite mold body through a flexible connecting piece. The invention has the characteristics of high molding precision, convenient adjustment and the like, and simultaneously improves the mounting precision, the supporting strength and the rigidity of the composite material spherical cover skin.

Inventors

  • WANG CHENG
  • TANG CHUNLIU
  • HAN BIN
  • TANG ZHENYAN

Assignees

  • 江苏恒神股份有限公司

Dates

Publication Date
20260508
Application Date
20260327

Claims (10)

  1. 1. The utility model provides a spherical cap covering shaping composite frock which characterized in that includes: The composite material mold body (1) is made of the same material as the spherical cover skin workpiece, the concave spherical surface of the composite material mold body (1) is a molding functional surface for molding the spherical cover skin workpiece, and the convex spherical surface of the composite material mold body (1) is provided with a plurality of reinforcing ribs; and the metal frame (2) is connected with the convex spherical surface of the composite mold body (1) through a flexible connecting piece.
  2. 2. The spherical cover skin molding composite tool according to claim 1, wherein the reinforcing ribs comprise a plurality of radial reinforcing ribs and a plurality of annular reinforcing ribs, and two ends of each radial reinforcing rib are respectively connected with the metal frame (2) through a flexible connecting piece.
  3. 3. The spherical cap skin molding composite tooling of claim 2, wherein the flexible connector comprises: a connecting corner piece (4) with one end connected with the radial reinforcing rib; the connecting rod (3), one end of the connecting rod (3) passes through the cushion block (5) and the other end of the connecting corner piece (4) and is fixed with the connecting corner piece (4) by using a nut, and the other end of the connecting rod (3) passes through the spherical gasket (6), the conical gasket (7) and the reinforcing rib seat plate on the metal frame (2) and is fixed with the reinforcing rib seat plate on the metal frame (2) by using the nut.
  4. 4. A spherical cover skin forming composite tooling according to claim 3, wherein the radial stiffener is bolted to the connection corner piece (4).
  5. 5. The spherical cover skin molding composite tool according to claim 1, wherein the reinforcing ribs are connected with the convex spherical surface of the composite mold body (1) in a gluing manner.
  6. 6. The spherical cover skin molding composite tool according to claim 1, wherein part cutting lines and paving allowance lines are scored at the edge of the molding functional surface according to the outline of the spherical cover skin product.
  7. 7. The spherical cover skin molding composite tool according to claim 1, wherein the metal frame (2) is in a welding structure form of a profile square tube and a steel plate.
  8. 8. The spherical cover skin molding composite tool according to claim 1, wherein a forklift hole and a base used for being installed and connected with paving equipment are arranged at the bottom of the metal frame (2), and a hoisting hole and a reference target hole are arranged above the metal frame (2).
  9. 9. A method of using the spherical cap skin molding composite tooling of any one of claims 1-8, comprising: The convex spherical surface of the composite mold body (1) is connected with the metal frame (2) through the flexible connecting piece; and adjusting each flexible connecting piece until the concave spherical surface of the composite material die body (1) meets the profile requirement of the spherical cover skin piece.
  10. 10. The method of claim 9, wherein adjusting each of the flexible connectors comprises: The relative position of the connecting rod (3) and the connecting corner piece (4) in the flexible connecting piece is adjusted by rotating the nut in the flexible connecting piece, and the profile of the composite material die body (1) is detected by using a reference coordinate system established by a laser tracker through a reference target point preset by the metal frame (2) until the required profile accuracy is achieved.

Description

Spherical cover skin molding composite tool and application method thereof Technical Field The invention belongs to the technical field of composite material molding, and particularly relates to a spherical cover skin molding composite material tool and a use method thereof. Background The composite spherical cover skin structure is a key bearing component of lightweight design of parts, such as an aerospace vehicle, which need to bear internal and external pressure differences, and the structure of the composite spherical cover skin structure is generally composed of a thin-wall spherical cover and radial and circumferential ribs, and the spherical cover skin is used as a bearing shell body and is in a spherical crown shape so as to effectively disperse load, uniformly distribute stress and reduce stress concentration. The spherical cover skin is connected with the engine body through the butt flange, so that the integration of the whole structure is realized, the spherical cover skin mainly bears the engine body load and maintains the geometric integrity of the engine body, and the safety, the weight and the fatigue life of the aerospace vehicle are influenced. The composite material spherical cover skin is used as a key bearing piece of the aerospace vehicle, any deviation can influence the reliability of the whole structure, and in order to realize high-precision manufacturing of the composite material spherical cover skin, a high-performance high-precision forming tool is required to be developed first, and the forming precision of the forming tool directly determines the forming quality of the composite material spherical cover skin. The molding tooling material needs to have good adaptability to the working environment and the working property, and further needs to have a thermal expansion coefficient matched with the workpiece, and has enough supporting strength and rigidity. In the prior art, the problems of low contour precision, difficult adjustment and the like still exist in the forming process of the composite material spherical cover skin, so that the installation, the supporting strength, the rigidity and the like of the composite material spherical cover skin are affected. Disclosure of Invention In order to solve the defects in the prior art, the invention provides the spherical cover skin molding composite tool and the application method thereof, which have the characteristics of high molding precision, convenient adjustment and the like, and simultaneously improve the mounting precision, the supporting strength and the rigidity of the composite spherical cover skin. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: In a first aspect, a composite material tool for molding a spherical cover skin is provided, and the composite material tool comprises a composite material die body which is made of the same material as a spherical cover skin workpiece, wherein an inner concave spherical surface of the composite material die body is a molding functional surface for molding the spherical cover skin workpiece, a plurality of reinforcing ribs are arranged on an outer convex spherical surface of the composite material die body, and a metal frame which is connected with the outer convex spherical surface of the composite material die body through a flexible connecting piece. Further, the reinforcing ribs comprise a plurality of radial reinforcing ribs and a plurality of circumferential reinforcing ribs, and two ends of each radial reinforcing rib are respectively connected with the metal frame through a flexible connecting piece. The flexible connecting piece comprises a connecting corner piece, a connecting rod, a nut and a reinforcing rib seat plate, wherein one end of the connecting rod penetrates through the cushion block and the other end of the connecting corner piece and is fixed with the connecting corner piece by the nut, and the other end of the connecting rod penetrates through the spherical gasket, the conical gasket and the reinforcing rib seat plate on the metal frame and is fixed with the reinforcing rib seat plate on the metal frame by the nut. Further, the radial reinforcing ribs are connected with the connecting corner pieces through bolts. Further, the reinforcing rib is connected with the convex spherical surface of the composite mold body in a gluing mode. Further, part cutting lines and paving allowance lines are scored at the edge of the forming functional surface according to the outline of the spherical cover skin workpiece. Further, the metal frame is in a welding structure form of a section square tube and a steel plate. Further, a forklift hole and a base used for being connected with paving equipment are arranged at the bottom of the metal frame, and a hoisting hole and a reference target hole are arranged above the metal frame. In a second aspect, the application method of the spherical cover skin molding composite tool