High temperature thermoforming circulating water-cooled solid self-lubricating cone

Abstract

The invention discloses a circulating water cooling solid self-lubricating cone for high temperature thermal correction. The circulating water cooling solid self-lubricating cone for high temperature thermal correction is characterized by comprising a pyramid cone body and a connection pull rod, the tail end of the pyramid cone body and the front end of the connection pull rod are connected through threads and a sealing ring; cylindrical solid lubricating materials are embedded in the outer surface of the pyramid cone body; a circulating water cooling chamber is arranged between the pyramid cone body and the connection pull rod. An oil supply device is not needed, the design, structure and the like are greatly simplified through the oil-free mode, cost is lowered, and design time is saved. The cooling chamber is arranged inside the pyramid cone body, and the cone is cooled through circulating water when the cone works so that the phenomenon that due to over high temperature, pulling or locking is caused when the cone and a mold slide relatively or a feather key and the cone slide relatively can be avoided.

Description

technical field [0001] The invention belongs to the field of machinery, and in particular relates to a circulating water-cooled solid self-lubricating cone used for high-temperature heat correction. Background technique [0002] Mechanical diameter expansion is an important process to ensure the quality of steel pipes in the production of welded pipes. Mechanical diameter expansion is a material processing technology that uses the principle of oblique block hole expansion and plastically deforms the tube blank through the split punch. Mechanical diameter expansion belongs to the rigid mold bulging technology in the field of pipe secondary processing. Mechanical diameter expansion can eliminate part of the residual stress caused by forming and welding, improve the internal stress distribution of steel pipes, and at the same time make the steel pipes reach the roundness and Straightness reduces construction difficulty. Diameter expansion has become an important process in the...

AI Technical Summary

Problems solved by technology

[0004] The cone under normal temperature conditions is prone to no lubrication and locking of the cone when the temperature of the correcting workpiece is 650 ° C to 850 ° C, so that the normal temperature expansion process cannot meet the high-precision expansion requirements of high-strength and high-precision steel pipes

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