Micro-pipe hydroforming device capable of axial feeding

Abstract

The invention discloses an axial feeding hydraulic forming device of a miniature tube. The device comprises two identical hydraulic forming sub devices, wherein the two hydraulic forming sub devices are located on both ends of the miniature tube when the miniature tube is hydraulically formed; each hydraulic forming sub device comprises a mold, an axial feeding system and an oil supply system, and both the axial feeding system and the oil supply system are accurately controlled by virtue of a PLC (Programmable Logic Controller) touch screen integrated machine, so that the axial feeding quantity and a pressure loading curve are variable and controllable in a forming process, and the possibility is provided for searching the optimum forming condition. According to the hydraulic forming device of the miniature tube, axial feeding can be performed, and the feeding quantity can be accurately controlled. The axial feeding hydraulic forming device has the following advantages of simple structure of the mold and convenience in installation; the miniature tube of which the outside diameter is 0.9 to 2 mm can be hydraulically formed only by replacing appropriate parts; and the axial feeding can be performed on the miniature tube in the hydraulic forming process.

Description

technical field [0001] The invention belongs to the hydroforming technology, and in particular relates to a hydroforming device for micro-pipe fittings capable of axial feeding, especially for micro-pipe fittings with an outer diameter of 0.9-2mm. Background technique [0002] The hydroforming technology of pipe fittings uses pipe blanks as raw materials. By applying liquid pressure and axial load to the pipe cavity, plastic deformation occurs in a given mold cavity, and the pipe wall is bonded to the inner surface of the mold to obtain Forming technology for parts of desired shape. At present, the hydroforming of pipe fittings is mainly used in the manufacture of automobile frame and chassis parts, large ships, and the aerospace industry. However, with the development of science and technology, the demand for micro-hollow pipe fittings in the electronics, medical, micro-device and other industries is increasing. There is an urgent need for a processing technology that can ...

AI Technical Summary

Problems solved by technology

But this process has such a problem that it destroys the original shape of the microtube and cannot achieve axial feeding

JamesBallanfonte Lowrie and his team designed a microtube hydroforming device that can be fed axially, but a press is needed to meet the mold sealing requirements. The molding equipment is large in size, and the axial feeding is manually controlled by a cam mechanism , it is impossible to precisely adjust the feeding amount and feeding speed; Yoshihiro Amikura et al pointed out in the fracture evaluation of A 1070Aluminum Micro-tubes Using Bulge Forming that the micro-tubes are sealed by extruding the O-ring with a plate

This sealing method has a good sealing effect, but it is still unreliable to seal the special high pressure of 350MPa

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