Device and method for drawing and forming thin-walled capillary tube assisted by ultrasonic vibration with controllable temperature and speed

Abstract

The invention belongs to the field of thin-walled capillary forming, and specifically discloses a temperature-controlled and speed-controlled ultrasonic vibration-assisted thin-walled capillary drawing and forming device and method, comprising an ultrasonic component, a temperature control component and a speed control component. The upper end of the ultrasonic component is provided with The wire drawing die is provided with an annular groove; the ultrasonic component is provided with an axial through hole, and the capillary tube to be drawn passes through the axial through hole and the wire drawing die; the temperature control component includes a precooling fluid pipe, a temperature regulating fluid pipe, Electric heating wire and temperature sensor, the pre-cooling fluid tube is inserted into the axial through hole, the temperature-adjusting fluid tube is inserted into the annular groove, the electric heating wire is installed in the wire drawing die, and the temperature sensor is installed on the wire drawing die; the speed control assembly includes a roller Disc and ultrasonic thickness gauge, the ultrasonic thickness gauge is used to detect the wall thickness of the capillary after drawing, and the roller disc is used to clamp the capillary from the upper end for drawing. A thin-walled capillary tube with small wall thickness and high surface quality, dimensional accuracy and strength can be obtained through the drawing and forming device provided by the present invention.

Description

technical field [0001] The invention belongs to the field of thin-walled capillary tube forming, and more particularly relates to a temperature-controlled and speed-controlled ultrasonic vibration-assisted thin-walled capillary tube drawing and forming device and method. Background technique [0002] Thin-walled capillaries are widely used in the refrigeration industry, and the wall thickness of the capillary will directly affect the heat transfer efficiency. The thinner the wall thickness, the higher the heat transfer efficiency. [0003] Compared with the conventional plastic forming process, the ultrasonic vibration-assisted plastic forming technology can effectively reduce the forming force of the material and improve the capillary forming performance to a certain extent. However, when the wall thickness of the capillary is less than 100 μm, the strength, surface quality and dimensional accuracy of the capillary after drawing and forming are still low. Therefore, in ord...

AI Technical Summary

Problems solved by technology

Therefore, in order to obtain a thin-walled capillary with small wall thickness, good surface quality, high dimensional accuracy and high strength, the existing drawing methods and devices can no longer meet the demand

Images