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Auxiliary heating system and electron beam welding thermal cycle method

An electron beam welding and auxiliary heating technology, applied in electron beam welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of heat damage of components, reduce welding stress, improve tissue properties, and reduce the probability of cracks. Effect

Active Publication Date: 2021-06-15
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Problems solved by technology

[0005] In order to solve the problem in the prior art that some components are damaged by heat caused by direct heating in the vacuum chamber of refractory and crackable materials in the welding preheating process, the embodiment of the present invention provides an auxiliary heating system and a preheated electron beam welding heat loop method

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  • Auxiliary heating system and electron beam welding thermal cycle method
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Embodiment Construction

[0030] The present invention will be described below in conjunction with the accompanying drawings, but it is not used to limit the scope of the present invention.

[0031] see figure 1 is a structural schematic diagram of an auxiliary heating device of the present invention, including. Heating cover 3, control device 6 and heat insulation layer 4, described heating cover 3 is used to be sleeved on described workpiece 5; Described heat insulation layer 4 is fixed between turntable and workpiece 5, and described heating cover 3 The top cover is removable.

[0032] The above-mentioned heating cover 3 is composed of a heating element 7, a temperature sensor 8, and a motion mechanism 9. The frame of the heating cover is composed of a 0.5mm stainless steel plate insulation layer and a stainless steel frame. Parts insulation; Arranged inside the heating hood, heating evenly, heat loss is small; can be disassembled separately, easy to replace when damaged, heating and deflation at ...

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Abstract

The embodiment of the invention provides an auxiliary heating device and an electron beam welding thermal cycle method. The auxiliary heating device comprises a heating cover, a control device and a thermal insulation layer, and the heating cover is used for being arranged above a workpiece in a sleeving manner. The thermal insulation layer is fixed between a rotary table and the workpiece, and a top cover plate of the heating cover is movably arranged. The auxiliary heating device is designed in electron beam welding equipment, a stable and uniform preheating temperature field is provided for welding materials and the workpiece before welding, the heating requirements of planar, annular and complex workpiece structures can be met, the use requirements of frequent and transient vacuum circulation heating can be met, and preconditions can be provided for subsequent reduction of welding heat input; and the control device is arranged, under the preheating condition, electron beam welding parameters are adjusted, heat cycle regulation and control of electron beam welding are achieved, the cooling speed and the temperature gradient of welding are reduced, surface forming of a weld joint is improved, welding heat stress and residual stress are reduced, and the probability of crack generation is reduced.

Description

technical field [0001] The invention relates to the technical field of electron beam processing, in particular to an auxiliary heating system and an electron beam welding thermal cycle method. Background technique [0002] Electron beam welding has become one of the commonly used welding methods in the field of aerospace technology due to its advantages such as pure weld seam, large aspect ratio, and precise and controllable energy. Since materials such as high-strength titanium alloys and ultra-high-strength steels have a high tendency to harden and are brittle, the fusion welding process has a greater impact on their brittleness. For materials that are refractory and easy to crack, the main problems and difficulties of conventional electron beam welding are: the heating and cooling speed is fast, and the hardening tendency is large; near the welding area, the welding temperature difference at different positions is large, that is, the temperature gradient is large, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K15/00
CPCB23K15/00B23K15/0026B23K15/0046
Inventor 李立航唐振云毛智勇赵桐陆幼青
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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