A microtube extrusion temperature control device

A technology of extrusion temperature and control device, which is applied in the direction of metal extrusion control equipment, metal extrusion, manufacturing tools, etc., can solve the problem of uneven extrusion pipe size, reduce the service life of extrusion dies, and reduce the surface hardness of die materials and other problems, to achieve the effect of reducing internal and surface defects, solving low service life and simple structure

CN108262364BActive Publication Date: 2020-09-25NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-09-25

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Abstract

The invention discloses a temperature control device for microtube extrusion. The temperature control device for microtube extrusion comprises a sleeve provided with an extrusion channel in the axialdirection. The extrusion channel is composed of a heating channel and a cooling channel. A heating cavity is formed in the wall of the portion, on the periphery of the heating channel, of the sleeve.A spiral pipe is arranged in the heating cavity. Both ends of the spiral pipe stretch out of the heating cavity. An electric heating wire is arranged in the spiral pipe in a penetrating mode. Both ends of the electric heating wire stretch out of the spiral pipe to be connected with a metal wire of an electric connector. The electric connector is fixed to a pipe orifice of the spiral pipe. A cooling cavity is formed in the wall of the portion, on the periphery of the cooling channel, of the sleeve. A cooling pipe is arranged in the cooling cavity and filled with cooling water. A water inlet anda water outlet of the cooling pipe both penetrate out of the cooling cavity. The temperature control device for microtube extrusion is simple in structure and convenient and fast to disassemble, micro-type, integrated and automatic heating and cooling during heating extrusion are achieved; and through heating and cooling, a microtube can be extruded smoothly, the size of a finished tube is ensured, and internal and surface defects are reduced.
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Description

technical field

[0001] The invention belongs to the technical field of metal material processing, and in particular relates to a microtube extruding temperature control device. Background technique

[0002] Metal microtubes are widely used in high-precision instruments and equipment such as aerospace pipelines and interventional stents. Generally speaking, the preheating of metal pipes before extrusion is one of the most critical steps in the process of hot extrusion profile preparation. During hot extrusion plastic forming, the higher the deformation temperature, the smaller the flow stress of the material and the better its plastic forming performance, so it is easier to prepare high-quality extrusion profiles. However, if the deformation temperature exceeds the temperature required by the process, metallurgical processing defects such as excessive grain growth, overburning or overheating will occur. At the same time, during the hot extrusion process of metal pipes, the ...

Examples

Embodiment Construction

[0025] Such as figure 1 , figure 2 with image 3 As shown, the present invention includes a pipe sleeve 1, and the pipe sleeve 1 is provided with an extrusion channel for extruding a tube blank in the axial direction, and the extrusion channel is composed of interconnected heating channels 1-3 and cooling channels 1-4, The diameter of the heating channel 1-3 is greater than the diameter of the cooling channel 1-4, and a heating cavity 1-1 is arranged on the sleeve wall of the pipe sleeve 1 on the side of the heating channel 1-3, and the heating cavity 1 -1 is provided with a spiral tube 5, both ends of the spiral tube 5 pass through the heating chamber 1-1, and the spiral tube 5 is pierced with a tube for heating and extruding the tube blank to the hot extrusion temperature. Electric heating wire 6, both ends of the electric heating wire 6 pass through the spiral tube 5 to connect with the metal core of the electrical connector 7, the electrical connector 7 is fixed at the ...