Multi-point three-dimensional electrothermal drawing-pressing composite bending forming device based on independent heat preservation mode

Abstract

The invention discloses a multi-point three-dimensional electrothermal drawing-pressing composite bending forming device based on independent heat preservation mode. The composite bending forming device mainly comprises a stretch bending control arm, a support, a bottom plate, a basic body, a lifting oil cylinder, a press bending oil cylinder, a die unit body, a temperature control cabinet, a power supply box and the like. According to the device, three-dimensional stretch bending forming of a section bar is achieved by adopting a vertical stretch-bending mode and a horizontal press-bending mode, and flexible forming of a three-dimensional bent workpiece with a complex geometric shape is achieved by adjusting use number of the basic body, the enveloping surface shape of a multi-point die and number of press bending oil cylinder actuating mechanisms at the two ends of the basic body; through the designed independent insulation box structure, temperature distribution on the section bar is more uniform, energy consumption is reduced, and forming precision is improved; in addition, temperature in each heat preservation box is monitored in real time, so that effective control of temperature in the whole forming process is achieved; and according to the self-resistance heating mode adopted to heat the metal section bar made of difficult-to-process material, plasticity of the formed workpiece is improved, deformation resistance of the workpiece is reduced, and accurate forming of three-dimensional hot stretch bending is achieved.

Description

technical field [0001] The invention relates to a multi-point three-dimensional electric heating drawing-compression composite bending forming device based on an independent heat preservation method, in particular, it relates to a device for hot drawing and bending forming of profiles such as rail passenger cars and airplanes, which belongs to the drawing and bending forming of metal profiles technology field. Background technique [0002] High-performance metal profile three-dimensional curved structural parts have the characteristics of high structural strength, smooth geometric shape, and excellent aerodynamic performance, so they are more and more used in the manufacturing of high-end equipment such as aircraft, rail cars, and automobiles. For example, the typical three-dimensional stretch-bent structure of aluminum profiles is used in the front frame of the CRH380 series of high-speed railways in my country. The three-dimensional bending of metal profiles means that th...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a multi-point three-dimensional electric heating drawing-compression composite bending forming device based on an independent heat preservation method to solve the problem of three-dimensional hot drawing and bending forming of difficult-to-machine metal material profiles, such as titanium alloy, high-strength Steel and other materials

Images