S-bend anti-wrinkling process for large-size multi-layer composite hollow pipe space

Abstract

The invention discloses an S-bend anti-wrinkling process for a large-size multi-layer composite hollow pipe space. According to the technical scheme, the S-bend anti-wrinkling process is characterized by comprising the following steps that S01, bending forming analogue simulation is carried out, and a bending forming pre-bending angle and the wheel mold radius of a bending forming mold are determined; S02, a bending forming test of a composite hollow pipe conductor is carried out according to the pre-bending angle and the wheel mold radius obtained according to the simulation result; S03, a straight-section composite hollow pipe conductor is selected, two soft semi-cylindrical copper gaskets with a certain thickness are arranged on the outer side of a stainless steel armor of a hollow pipe in a lining manner so as to adjust the local contact stress of the outer side of the stainless steel armor, and two stainless steel sheaths with a certain thickness are arranged on the outer sides of the copper gaskets in a lining manner so as to adjust the local bending stress of the composite hollow pipe; and S04, the hollow pipe conductor provided with the gaskets and the sheaths is arranged in a clamping mold of a bending mold, and pressure is applied to a wheel mold according to the pre-bending angle in the step S02 so as to form a first-section arc of the S-bend conductor. The forming process has the beneficial effects that forming wrinkles are avoided, and the forming process can be suitable for complex structures and composite bending forming.

Description

technical field [0001] The invention relates to a hollow tube processing method, in particular to a space S-bend anti-wrinkle technology of a large-scale multilayer composite material hollow tube space. Background technique [0002] The composite material hollow tube adopts a three-layer structure, the inner layer structure is a metal material with good electrical and thermal conductivity, the middle layer is a non-metallic material with good insulation and radiation resistance, and the outer layer is a high-strength stainless steel metal material. In view of the above advantages, composite hollow tubes are widely used as current-carrying coils in high temperature, strong magnetic field, high current, and strong irradiation environments. [0003] In order to ensure that the current-carrying coils can transmit large currents, strong magnetic fields and have insulation and radiation resistance properties, the current-carrying coils often contain multiple layers and multiple tu...

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Problems solved by technology

[0003] In order to ensure that the current-carrying coils can transmit large currents, strong magnetic fields and have insulation and radiation resistance properties, the current-carrying coils often contain multiple layers and multiple turns, between layers, and between turns usually use S bends for transition ( like figure 1 As shown), because the size of the S-bend is shorter and it is a three-dimensional space structure, its bending difficulty is much greater than that of the plane U-bend and O-bend. In addition, because the composite hollow t

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