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Spinning forming process of extra-high-voltage shielding cover

A technology of spinning forming and shielding cover, which is applied in the direction of forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems of difficult forming of complex parts, wasteful materials, and poor performance of welding places, so as to save welding equipment, Avoid direct contact, beautiful appearance effect

Active Publication Date: 2014-01-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has low production efficiency, poor welding performance, waste of material, high production cost, long preparation period, and complex parts are not easy to form

Method used

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  • Spinning forming process of extra-high-voltage shielding cover
  • Spinning forming process of extra-high-voltage shielding cover

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Embodiment Construction

[0029] For the UHV shield of this shape in the present invention, the two-body forming method is generally used now, first using the stamping process or spinning process to manufacture the upper and lower parts of the workpiece, and then welding the two parts together. Its main disadvantage is that the corrosion resistance of the weld is poor, and it is easy to be broken down by discharge in a high-voltage environment and fail. The failure of the weld has become the main reason for the failure of this type of product. This kind of two-body forming process has many defects such as multiple matching molds, long processing cycle, difficult forming of parts with complex shapes, and high cost. Due to the need for welding, the product of this method has a thicker wall thickness, and the material cost is high.

[0030] The invention provides a spinning forming process of an ultra-high voltage shielding cover. At room temperature, a computer numerical control (CNC) spinning machine is...

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PUM

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Abstract

The invention discloses a spinning forming process of an extra-high-voltage shielding cover. A computer digitally controlled spinning machine is adopted to integrally process a plate material into the extra-high-voltage shielding cover. The spinning forming process comprises the following steps of blanking, preliminary spinning, inner hole turning, drawing and spinning, primary edge turning, trimming, secondary edge turning and polishing cleaning. The extra-high-voltage shielding cover produced by adopting the process is light in weight, small in thickness and high in material utilization rate. The welding processing is not needed, a welding device is not needed, all of processing can be finished only through one spinning machine, operation is simple and convenient, and the processing cost is reduced. A unique inner-turnup bending and spinning process is adopted, edges of workpieces are wrapped inside the workpieces, direct contact between the workpiece edges and the outside environment is avoided, the corrosion resistance is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to a processing technology of cover parts, in particular to a spinning forming process of an ultra-high voltage shielding cover. Background technique [0002] Ultra-high voltage transmission can effectively reduce the loss of electric energy in the process of power grid transmission, and the voltage higher than 300kV is usually called ultra-high voltage. Ultra-high voltage shielding cover is an important part to protect some electric equipment in high voltage power grid. These power components will discharge during work, so they need to be shielded and protected. Due to the different structures of electrical equipment, the external shielding covers also have correspondingly different shapes. Therefore, for the ultra-high voltage shielding cover, it is necessary not only to meet the performance requirements under the ultra-high voltage, but also to match the shape of the power equipment it protects. Ultra-high voltage shields ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21D22/16B21D37/10
CPCB21D22/16B23P15/00
Inventor 曹振董杰陈志川靳丽章桢彦王锋华
Owner SHANGHAI JIAO TONG UNIV
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