Manufacturing method of separation block with high-precision diameter for separating conductor

Abstract

The invention relates to a manufacturing method of a separation block for separating a conductor of a power cable with large cross section. The method comprises the following steps of (1) compacting and forming procedure, adopting a compacting die, enabling the hole type of the compacting die to be uniform with the type and size of the separation block, firstly, enabling a single copper line and an inner conductor of the separation block to penetrate through the compacting die, and compacting and forming an outer conductor of the separation block by the compacting die; and (2) pretwisting procedure, enabling the compacted and formed separation block to penetrate through press wheels by the compacting die, enabling the hole types of the closed press wheels to be uniform with the hole type of the compacting die, and providing axial torsion for the press wheels when the separation block penetrates through the press wheels, so as to pretwist the separation block. The method has the advantages that the press wheels are replaced by the compacting die to compact and form, and meanwhile, a pretwisting pitch is provided for the press wheels same in shape and size; and the condition of abnormal shape of the separation block due to the nonuniform stress of the sector surface of the compacting die caused by only using the compacting die for completing compacting, forming and pretwisting can be avoided.

Description

technical field [0001] The invention belongs to the conductor manufacturing technology of power cables. Background technique [0002] Split conductors are widely used in large cross-section power cables, and split blocks are the units that make up the split conductors. At present, pressure rollers are used in the production of split blocks, and the size is controlled by adjusting the gap between the pressure rollers. However, due to the gap between the pressure roller itself, the bearing, and the pressure roller frame will change when the force is applied, the gap between the pressure rollers Not easy to adjust. There are usually two factors that can cause the conductor size to be unstable: one is to adjust a fixed pressure wheel gap before production, but after a period of pressing, the pressure wheel gap is prone to change, resulting in changes in the conductor size. The second is that the size and softness and hardness of the single wire of the conductor will change on ...

AI Technical Summary

Problems solved by technology

At present, pressure rollers are used in the production of split blocks, and the size is controlled by adjusting the gap between the pressure rollers. However, due to the gap between the pressure roller itself, the bearing, and the pressure roller frame will change when the force is applied, the gap between the pressure rollers Difficult to adjust

There are usually two factors that cause the conductor size to be unstable: one is to adjust a fixed pressure wheel gap before production, but after a period of pressing, the pressure wheel gap is prone to change, resulting in changes in the conductor size

The second is that the size and softness and hardness of the single wire of the conductor will change on the entire conductor, and the lateral force during pre-twisting will cause changes in the reaction force to the pressure roller during molding, which will cause a small change in the clearance of the pressure roller, and will also cause the conductor to be pressed. Type size changes

[0003] see figure 1 The 5-divided conductor, the size change of the segment 1 directly causes the fluctuation of the outer diameter of the conductor after the 5 segmented blocks are plied together, which will have an adverse effect on the cable quality and material consumption.

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