Sectioned shape-control and temperature-control three-dimensional thermal stretch bending forming device

Abstract

The invention discloses a sectioned shape-control and temperature-control three-dimensional thermal stretch bending forming device which is mainly composed of a base, a sectioned insulating box, a forming unit, a hydraulic oil cylinder bracket, a hydraulic oil cylinder, a transformer and a temperature control cabinet, wherein the base is L-shaped and a plurality of T-shaped grooves are formed in the base in the longitudinal direction; the forming unit is mounted in T-shaped grooves through T-shaped slide blocks at the bottom of the bracket; the sectioned insulating box is mounted on a slide block guide rail of the forming unit to form a follow-up structure so as to move along with the forming unit; openings in two sides of the sectioned insulating box are closed by a high-temperature-resistant flexible protecting curtain and an asbestosed wire gauze, so that heat diffusion is reduced; the hydraulic oil cylinder is fixed to the hydraulic oil cylinder bracket and the base, a piston rod of the hydraulic oil cylinder is fixedly connected to a back plate of the forming unit, and displacement of the piston rod is controlled to adjust the position of the forming unit and a positioning function to the forming unit is obtained; a section bar is heated by self resistance, the transformer is connected to the section bar and the temperature control cabinet, and the temperature control cabinet controls heating of a resistance wire and acquisition of thermocouple data. By designing the sectioned shape-control and temperature-control device which has an independent insulating property andmoves along with the section bar in a forming process, the heating efficiency and the temperature control precision are improved, and flexible, efficient and low-cost three-dimensional thermal stretch bending precision forming of hardly processed metal section bars at constant temperature is realized.

Description

technical field [0001] The invention relates to a three-dimensional thermal stretch bending forming device with segmental shape control and temperature control, in particular to a device for thermal stretch bending forming of titanium alloy profiles of aircraft or rail trains, belonging to the technical field of stretch bending forming of metal profiles . Background technique [0002] The three-dimensional stretch-bending formed parts of metal profiles can be widely used in the production of three-dimensional skeleton structural parts of aerospace vehicles, rail trains, and automobiles. The principle of stretch bending is to apply a tangential tension to the profile and change the position of the internal neutral layer to bend the profile. The stretch bending process has a good forming effect on bending parts with relatively large yield strength, and has high bending quality and small springback, so it is widely used in the forming and manufacturing of aircraft fuselage, bu...

AI Technical Summary

Problems solved by technology

However, there are the following problems in the field of hot stretch bending of metal profiles: First, the current process methods and devices for metal stretch bending are mainly aimed at two-dimensional hot stretch forming, and there are relatively few studies on three-dimensional hot stretch bending. The technology is immature, and the equipment and process are not perfect; the second is for multi-point three-dimensional hot stretch forming, generally using an integral insulation box, and the mold is covered in the box as a whole. The disadvantages are: large heating space, high energy consumption, and measurement The temperature is not accurate enough and has time delay. At present, there is no good and efficient heating and heat preservation device and process method.

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