Spinning method for bottle neck part of electrically conductive contact finger and matched spinning device

Abstract

The invention provides a spinning method for a bottle neck part of an electrically conductive contact finger. The spinning method is characterized in that while radial force is applied to a cylinder-shaped blank of the electrically conductive contact finger in the spinning process, axial pressure is applied to the cylinder-shaped blank of the electrically conductive contact finger in the axial direction of a core mold by utilizing a pressure loading mechanism, so that once the bottle neck part of the electrically conductive contact finger is stretched to be thinned under the action of the radial pressure of a spinning wheel, the axial pressure applied to the cylinder-shaped blank of the electrically conductive contact finger can push material to flow towards the thinned part of the bottle neck part in real time to timely supplement the stretched part, thereby preventing the bottle neck part of the electrically conductive contact finger from being stretched to be thinned. The spinning technology is simple to operate, is very convenient to implement and effectively guarantees the wall thickness of the bottle neck part of the electrically conductive contact finger in the spinning process, thereby guaranteeing that the electrically conductive contact finger manufactured by adopting the spinning technology has high flow capacity and satisfies the requirement of a megavolt power transmission and transformation line for an effective area of a through-flow cross section of the electrically conductive contact finger of a bypass isolating switch, and laying a solid foundation for smooth passing of 6300A of current.

Description

technical field

[0001] The invention belongs to the technical field of spinning processing, and more precisely relates to a spinning processing method for the bottle neck of an UHV conductive contact finger and a spinning processing device specially used for implementing the method. Background technique

[0002] With the continuous development and expansion of the national power market, UHV and high-current power transmission and transformation products have become the leading products in the power market, and the demand for million-volt series products continues to increase. In particular, the bypass isolating switch plays an important role in increasing the transmission power and maintaining the stability of the line in the million-volt power transmission line, and the conductive contact finger is a key part of the bypass isolating switch, and its current capacity is required to reach 6300A . The conductive contact finger of this bypass isolating switch is mainly made of ...

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