A composite mold removable bushing assembly and installation and replacement method

Abstract

The invention belongs to the technical field of pre-embedding of composite material composite mold bushings, and discloses a composite material mold removable bushing assembly and an installation and replacement method. Through the improvement of the threaded bushing and the threaded through-hole bushing, the blind hole and the through-hole threaded sleeve in the composite composite mold are replaced, and the problem that the embedded threaded bushing cannot be repaired and replaced is changed. It avoids the disadvantage that the composite tooling cannot be used due to the wear of the inner thread of the threaded bushing and the deformation of the bushing protrusion. The simple replacement method meets the requirements of bolt connection, thereby greatly improving the service life of composite tooling, and realizing efficient, accurate and low-cost forming of composite parts.

Description

technical field [0001] The invention belongs to the technical field of composite material composite mold bushing pre-embedding, and particularly relates to a composite material mold removable bushing assembly and an installation and replacement method. Background technique [0002] Composite molds play a vital role in forming composite parts. Composite tooling is widely used because of its light weight, very close thermal expansion coefficient to the product, very suitable for products with complex shapes, and the lowest manufacturing difficulty. [0003] However, the composite tooling also has certain drawbacks. For the composite mold whose main mold body is a composite material, there will inevitably be a threaded bushing in the mold for screw connection between the molds, and there are mainly two connection methods between the threaded bushing and the mold body. Most of them adopt a simple screw connection. One is that the external thread part of the threaded bushing is d...

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Problems solved by technology

[0003] However, composite material tooling also has certain disadvantages. For the composite mold whose main mold body is made of composite materials, there must be threaded bushes in the mold for screw connection between the moulds, and there are mainly two connection methods between the threaded bushes and the mold body. Most of them adopt a simple screw connection form. One is that the external thread part of the threaded bush is directly screwed with the mold body of the tooling, and the gap between the tooling and the bushing is filled by glue and fiber. In this method, the threaded bush and the mold body are bonded. The force is small and the strength is not enough. After the internal thread fails, the failed threaded bush can only be taken out by pulling it off, and the screw thread cannot be copied on the tooling mold body after pulling off, and the second replacement cannot be performed.

The other is the pre-embedded method. The advantage of this method is that it increases the fastening force of the tooling body to the threaded sleeve, but it is difficult to maintain when the thread fails, and it will cause greater damage to the tooling when the threaded sleeve is removed.

The biggest disadvantage of the above two methods is that after the connecting thread fails, the maintenance is difficult, the damage to the tooling is large, and the service life of the tooling after maintenance cannot be guaranteed.

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