Sleeve pulling shaping method of nickel titanium base marmem pipe material

Abstract

A sleeving-pulling technology for manufacturing the NiTi-based marmem pipe includes machining NiTi-based marmem pipe blank and mandrel, heating them and die to 200+ / -10 deg.C, spraying lubricant,inserting the mandrel in the pipe blank, reducing the diameter of both ends, heating it to 700+ / -20 deg.C and die to 350+ / -10 deg.C, drawing more times while spraying lubricant, cutting out both ends, heating to 800-850 deg.C, and pulling the mandrel out of the pipe.

Description

Technical field: [0001] The invention relates to a pipe forming method, in particular to a nickel-titanium-based shape memory alloy pipe sleeve-drawing forming method. It belongs to the technical field of pipe processing. Background technique: [0002] Nickel-titanium-based shape memory alloy pipes are widely used in fasteners, connectors and medical fields. Nickel-titanium-based shape memory alloy seamless pipe is a difficult-to-machine profile. For decades, the plastic forming of nickel-titanium-based shape memory alloy pipes has been one of the difficulties and hot spots in the field of plastic processing engineering at home and abroad. Its products have important applications in hydraulic pipe joints, various types of catheters in the medical field, various types of vascular stents, miniature reconnaissance aircraft, insect robots and other miniature weapons and equipment, as connecting parts and carrying connections. Before the present invention was made, the domesti...

AI Technical Summary

Problems solved by technology

Because each deformation of cold rolling is very small, there are many cold rolling passes; the cost of vacuum annealing is high and the time is long

Therefore, this process is labor-intensive and time-consuming, takes up equipment for a long time, and has high production costs.

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