Machining technology for electrified railway overhead line system metal die forging porcelain insulator lower steel cap

A technology for electrified railways and porcelain insulators, applied in circuits, insulators, electrical components, etc.
CN103515035AActive Publication Date: 2014-01-15SHANDONG SHENLI RIGGING
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG SHENLI RIGGING
Publication Date
2014-01-15

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Abstract

The invention provides a machining technology for an electrified railway overhead line system metal die forging porcelain insulator lower steel cap. The machining technology comprises the steps that a blank with the diameter being 70mm*125mm is cut, a ceramic fiber blanket wraps the blank to slow down the heat loss, upsetting is carried out on the heated blank, an oxide skin on the outer circular surface of a middle blank is removed through a steel brush after upsetting to improve the quality of a forge piece, die forging is carried out, a cylindrical part is forged into the circular cone cylindrical shape and then is forged into the cylindrical shape with the equal diameter, forging quality is good, forging efficiency is high, quenching is carried out on a finished forge piece, an oxide skin on the surface of the finished forge piece is removed through a grinding brush, a through hole and the inner wall of the cylindrical part are machined, the surface is processed, galvanization is carried out, and then machining of the lower steel cap is finished.
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Description

technical field

[0001] The invention relates to the processing technology of the lower steel cap of the metal die forging porcelain insulator of the electrified railway catenary. Background technique

[0002] The steel caps of porcelain insulators for electrified railway catenary include upper steel caps and lower steel caps, figure 1 The structure of the lower steel cap is shown, and the lower steel cap includes a cylindrical part 5, an ear part 6 and a connecting bottom plate between the cylindrical part and the ear part. The ear portion has a through hole 7 and the cylindrical portion has a corrugated inner wall 4 . The existing cast steel caps inevitably have defects inside, causing the actual effective size of some steel caps to be smaller than the design value, failing to meet the requirements of strength and the like. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a processing technology for the lo...

Claims

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