Apparatus for dieless thermoforming or heat treatment of metal tubing

Abstract

The invention discloses a device for metal pipe die-free hot forming or heat treatment. The device comprises a mechanical driving module, an induction heating module, an annular cooling module, a measuring and feedback module and a supporting and fixing module, wherein the mechanical driving module is provided with two rack push plates capable of moving in a linear mode to be used for providing driving force for deformation or motion of a metal pipe, the induction heating module is used for realizing local rapid heating of the metal pipe, the annular cooling module is used for realizing localrapid cooling of the metal pipe, the measuring and feedback module is used for monitoring the temperature data of the metal pipe and the data of the driving force applied to the metal pipe, and performing feedback adjustment on the working modes of the mechanical driving module, the induction heating module and the annular cooling module based on the temperature data and the driving force data, and the supporting and fixing module is used for supporting the mechanical driving module, the induction heating module, the annular cooling module and the measuring and feedback module. According to the device for metal pipe die-free hot forming provided by the embodiment can be used for processes such as die-free stretching, die-free compression and gradient heat treatment of the metal pipe to realize rapid die-free hot forming and heat treatment of various functions.

Description

technical field [0001] The invention relates to the technical field of metal pipe thermoforming, in particular to a dieless thermoforming device for metal pipes, which can also be used for heat treatment of metal pipes (rods), including gradient heat treatment. Background technique [0002] Metal tubing is a widely used part in daily life and production. In the medical and electronic fields, micro metal tubing is often used for drug injection and heat dissipation of electronic devices. The diameter of micro tubing for injection and micro heat pipes in large-scale integrated circuits is generally Both are less than 0.5mm, so there is a high requirement for the forming accuracy of metal pipes. [0003] In the automotive industry, metal bellows with relatively large diameter and thickness and metal thick-walled pipes after gradient heat treatment are often used as buffer energy-absorbing components for vehicle collisions; in the chemical and pressure vessel industries, thick-wa...

AI Technical Summary

Problems solved by technology

At present, the traditional forming methods of metal bellows include hydroforming, mechanical processing, rolling forming, welding forming and deposition forming, etc. For the processing of metal bellows of different sizes and specifications, different forming molds need to be replaced. These processes usually require large-tonnage presses and complete sealing systems, and the forming equipment has complex structures and high costs

In response to this problem, scholars at home and abroad have proposed a method for forming metal bellows without dies, such as the continuous die-free forming device with the publication number CN106964680A, which realizes the function of feeding compression through the cooperation of multiple sets of nip rollers; but the nip rollers required by the device The structure is complex, and it is necessary to replace the corresponding type of nip rolls for different diameters of the tube blank, and the roller head on the pinch roll provides axial compression force in the form of friction, which is easy to cause scratches and reduce the surface quality of the tube blank

[0004] In addition, with the increasingly complex application scenarios, the demand for heterogeneous metal pipes with gradient distribution of mechanical properties is also increasing year by year. To achieve precisely controlled gradient heat treatment, special customized equipment is often required

For example, the rod-shaped material gradient heat treatment device with the publication number CN109797273A uses a heating furnace as a heat source and realizes continuous temperature measurement by moving a thermocouple. gradient heat treatment

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