Stretch-bending forming device with insulated stretching head and forming method thereof

Abstract

The invention discloses a stretch-bending forming device with an insulated stretching head and a forming method of the stretching-bending forming device. The insulated stretching head is arranged between a rotating support arm of a stretch-bending machine and a pneumatic chuck, and the two ends of insulated stretching head are connected with a rear cover of the pneumatic chuck and the rotating support arm of the stretch-bending machine respectively. An insulated working platform is arranged on the upper surface of a rotary table of the stretch-bending machine. A stretch-bending die is installed on the upper surface of the insulated working platform. A pulse power supply is located at one side of the rotary table of the stretch-bending machine and the pneumatic chuck, the pulse power supply keeps a safety distance from the rotary table of the stretch-bending machine and the pneumatic chuck, and a lead line of the pulse power supply is connected to a part to be formed. According to the stretch-bending forming device with the insulated stretching head, the insulated stretching head is used for achieving insulation between the part to be formed and a machine body of the stretch-bending machine, and therefore the safety of personnel and equipment are guaranteed. Due to applied electric plasticity stretching-bending forming, the resistance to deformation of materials is reduced, the forming limit of the materials is greatly improved, the surface quality and the comprehensive mechanical property of a product are improved, and the production quality and production efficiency of the part are improved. Besides, the stretch-bending forming device with the insulated stretching head is convenient to use, practical, simple in structure, easy to produce and manufacture, and good in insulation effect.

Description

technical field [0001] The invention relates to the technical field of stretch-bending forming of metal profiles, in particular to an electroplastic stretch-bending insulating slider and a forming device for aluminum-lithium alloy profiles. Background technique [0002] Stretch bending forming of profiles has been widely used in aircraft manufacturing, mainly used to form connecting parts such as fuselage, bulkhead, rib, engine frame, etc. The use of stretch bending technology can make the parts obtain a reasonable correction margin and improve the quality of the parts. Manufacturing precision, reduce the manufacturing cost of parts. However, with the increasing requirements of product processing precision, defects such as springback, wrinkling and outer layer cracking in the existing profile stretch bending forming process have become more prominent, which limits the application of traditional stretch bending forming. [0003] Chinese patent CN 102172689 (lightweight metal...

AI Technical Summary

Problems solved by technology

However, this method has the following disadvantages: the insulating layer will leak due to friction and damage during use and the coating will age and fall off. need

Aluminum-lithium alloy is a very potential structural material. Due to its low density and easy processing, it will be widely used in the aviation manufacturing industry, but it also affects some properties because of its brittleness.

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